SH-015 Rocker Arm Stirling Engine Model Science Technology Puzzle Novelty Toys
Direct purchase from the factory 
Malipo Salama Yanahakikishiwa
Zawadi ya Bure
Sera ya Usafirishaji
Sera ya KurudishaZawadi ya Bure
Karibu Roymall, tovuti yako ya kitaalamu ya kununua zawadi za hifadhi ya duka. Tunathamini na kushukuru msaada wako, na tunataka kuonyesha shukrani yetu kwa kuongeza kipengele cha msisimko wa ziada kwa ununuzi wako. Unaponunua nasi, sio tu utapata bidhaa za hali ya juu zinazoboresha maisha yako, lakini utapata pia zawadi ya bure ya kipekee kwa kila agizo lako. Tayari kuchunguza mkusanyiko wetu na kupata zawadi zako kamili? Chunguza uteuzi wetu wa bidhaa za hifadhi ya duka, weka agizo lako na subiri msisimko wa zawadi yako ya bure kufika pamoja na ununuzi wako.Sera ya Usafirishaji
Tutafanya kazi kwa bidii kukufikishia bidhaa baada ya kupokea maagizo yako na kuhakikisha zinafika salama. Maelezo ya uwasilishaji yatakuwemo kwenye barua pepe yako ya uthibitisho.Kwa hali ya kawaida, maagizo huchakatwa ndani ya siku 2. Katika hali maalum, yanaweza kucheleweshwa kama ifuatavyo: Unapoagiza Jumamosi, Jumapili au siku za likizo, itacheleweshwa kwa siku 2.Kwa kawaida, inahitaji siku 5-7 za kazi (Jumatatu hadi Ijumaa) bila kuathiriwa na ucheleweshaji wa ndege au mazingira mengine.Kwa sababu huduma yetu ya usafirishaji ni kimataifa, muda wa uwasilishaji utategemea eneo lako, kwa hivyo inaweza kuchukua muda na tafadhali subiri kwa subira ikiwa uko katika wilaya au nchi za mbali.1. Sera ya Kurudisha na Kubadilisha
Tunakubali tu bidhaa zilizonunuliwa kutoka roymall.com. Ikiwa unanunua kutoka kwa wasambazaji wetu wa ndani au wauzaji wengine, huwezi kuzirudisha kwetu. Bidhaa za mauzo ya mwisho au zawadi za bure hazikubaliki kwa kurudisha.Ili kuwa na haki ya kurudisha, bidhaa yako lazima isitumike na iwe katika hali ileile uliyoipeleka. Pia lazima iwe kwenye pakiti ya asili.Baada ya kupokea maagizo ya kurudisha kutoka kwetu, tafadhali pakiti bidhaa zako zilizorudishwa na kuacha kifurushi chako kwenye ofisi ya posta ya ndani au mtoa huduma mwingine wa usafirishaji.Tutachakata bidhaa yako ya kurudisha au kubadilisha ndani ya siku 3-5 za kazi baada ya kuipokea. Rudi pesa itachakatwa na kuwekwa kiotomatiki kwenye njia yako ya awali ya malipo.Hakuna kurudisha au kubadilisha kunaweza kukubaliwa ikiwa bidhaa ilitengenezwa kwa maagizo maalum, ikiwa ni pamoja na saizi maalum, rangi maalum au uchapishaji maalum.Ikiwa unahitaji msaada zaidi, tafadhali wasiliana nasi. service@roymall.com au Whatsapp: +8619359849471
2. Sera ya Kurudisha Pesa
Utapata rudi pesa kamili au stoo 100% ya stoo baada ya kupokea na kukagua kifurushi kilichorudishwa. Rudi pesa itachakatwa kiotomatiki kwenye njia yako ya awali ya malipo.Tafadhali kumbuka kuwa gharama za usafirishaji na ushuru wowote au ada hazirudishiwi. Gharama za ziada za usafirishaji hazirudishiwi mara tu kifurushi kimetumwa. Wewe ndiye mwenye jukumu la kulipa ada hizi na hatuwezi kuziacha au kuzirudisha, hata kama agizo litarudishwa kwetu.Mara tu tutakapopokea na kuthibitisha bidhaa yako iliyorudishwa, tutakutumia barua pepe kukujulisha kuwa tumepokea bidhaa yako. Pia tutakujulisha kuhusu uthibitisho au kukataliwa kwa rudi pesa yako.Ikiwa una shida yoyote kuhusu mchakato wa kurudisha pesa, tafadhali wasiliana nasi. service@roymall.com au Whatsapp: +8619359849471Significance and Value of Use:The product can be used as a decoration with collectible value. The principle of the Stirling engine model is intuitive. It can be used as an educational toy to help develop children"s interest in learning. It can also be used as a teaching experiment device for classroom use. , Simple and convenient, entertaining and fun, through the hands-on operation, a more intuitive understanding of the principles of the Stirling engine model.Specification:Model: SH-015Product Name: Rocker Arm Stirling Engine ModelColor: As ShownMaterial: MetalNumber of Cylinders: 2Bore Diameter x Stroke: 10mm x 10mmSpeed: 3700-4000 rpmFlywheel Diameter: 36mmProduct Dimensions: 10.8 x 7 x 7.8cmWeight: 450gPackage Dimensions: 13 x 9 x 10cmFor Age: 8 years old and aboveFeatures:- This Stirling engine model adopts T-shaped rocker crank structure, which has the characteristics of high power and high speed;- The moving parts of the whole machine are inlaid with rolling bearings, and the friction coefficient is low;- The cylinder piston is precision ground with SUJ-2 alloy steel, with clearance Precision, high hardness and good wear resistance;- The overall connection is fixed by screws, all connection parts are sealed by copper pads, and the performance is reliable and high temperature resistance;- High-density aluminum alloy heat sink, higher heat exchange rate;- Base with double-layer spring shock absorption, Smoother operation;- All-metal material, ultra-small size, compact structure, high reliability;- Industrial-grade processing level, creating an all-metal exquisite model, unique and innovative, is a novel fashion gift and collectible;- The whole machine is assembled by more than 150 small parts, including 12 rolling bearings, 30 stainless steel bolts, etc;- The appearance parts are made of 6061 Sandblasted and oxidized surface of CNC aluminum alloy after processing.Instructions for Use and Maintenance:(1) Before use, dial the flywheel to check whether it rotates smoothly, if there is excessive resistance, check if the cylinder is blocked by sludge, and if necessary, remove the cylinder assembly and wipe the piston and cylinder with alcohol. And apply graphite lubricant on the surface of the piston;(2) Inject 95% alcohol into the alcohol lamp (capacity is less than two-thirds), then ignites the alcohol lamp and place it under the heating cylinder to heat for 40 seconds (the flame should be in the heating zone as much as possible) , At last you can rotate the flywheel at high speed;Note:(1) The heating source will cause the body to generate high temperature during operation. Do not touch the high temperature parts such as the heating cylinder and heat sink, otherwise it will cause thermal burns;(2) Use only ordinary alcohol lamp heat sources, and do not use windproof lighters. And other high-temperature dark fire heaters (above 500 C), otherwise it will cause damage to the piston cylinder at high temperature and high speed operation;(3) Do not apply any lubricating liquid grease to the piston cylinder, otherwise it will cause excessive resistance and fail to work;(4) The machine has a starting compression force. It is recommended that novices use the engine base to start for the first time use, which is easier to control.(5) Product data are all manually measured, there may be slight errors.Package Included:1 x Stirling Engine Model
