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Byenveni nan Roymall, sit entènèt pwofesyonèl ou pou achte kado depatman magazen prim. Nou valè ak apresye sipò ou, epi nou vle eksprime rekonesans nou an nan ajoute yon touche eksitasyon siplemantè nan acha ou yo. Lè w ap fè makèt avèk nou, ou pa sèlman jwenn pwodwi ki gen bon jan kalite ki amelyore fòm ou, men ou pral resevwa tou yon kado gratis eksklizif ak chak lòd ou fè. Ou pare pou eksplore koleksyon nou an epi jwenn kado pafè ou yo? Parcou seleksyon nou an nan atik depatman magazen prim, fè lòd ou, epi tann eksitasyon kado gratis ou a ki rive ansanm ak acha ou.Règleman livrezon
Nou pral travay di pou livre atik ba ou apre resevwa lòd ou yo epi asire yo rive an sekirite. Detay livrezon yo pral bay nan imèl konfimasyon ou.Nan pifò ka, lòd yo trete nan 2 jou.Nan sikonstans espesyal, li pral retade jan sa a: Lè ou fè yon lòd samdi, dimanch oswa jou ferye, li pral retade pou 2 jou..Nòmalman, li bezwen 5-7 jou ouvrab (lendi a vandredi) san yo pa afekte pa reta vòl oswa lòt faktè anviwònman..Paske sèvis livrezon nou an se mondyal, tan livrezon yo pral depann de kote ou ye kidonk li ka bezwen kèk tan epi tanpri rete pasyan si ou nan distri oswa peyi aleka.1. Règleman Retounen & Echanj
Nou sèlman aksepte atik achte sou roymall.com. Si ou achte nan distribitè lokal nou yo oswa lòt revandè, ou pa ka retounen yo sou bò nou. Atik lavant final oswa kado gratis yo pa akseptab pou retounen. Pou kalifye pou yon retounen, atik ou a dwe itilize epi nan menm kondisyon ke ou te resevwa li. Li dwe tou nan anbalaj orijinal la.Apre resevwa enstriksyon retounen nan men nou, tanpri anbalaje atik retounen ou yo epi depoze pake ou a nan biwo lapòs lokal la oswa yon lòt kurye.Nou pral trete atik retounen oswa echanj ou a nan 3-5 jou ouvrab apre nou resevwa li. Rembousman an pral trete ak kredite otomatikman nan metòd orijinal ou a nan peman.Pa gen retounen oswa echanj ka aksepte si pwodwi a te pwodui koutim, ki gen ladan gwosè koutim, koulè koutim, oswa enprime koutim.Bezwen plis èd, tanpri kontakte nou. service@roymall.com oswa Whatsapp: +8619359849471
2.Règleman Rembousman
Ou pral jwenn yon rembousman konplè oswa 100% kredi magazin apre nou resevwa pake retounen an epi verifye li. Rembousman an pral trete ak kredite otomatikman nan metòd orijinal ou a nan peman. Tanpri sonje ke frè livrezon ak nenpòt dwa oswa frè yo pa rembousab. Frè livrezon siplemantè yo pa rembousab yon fwa pake a te anbake. Ou responsab pou peye frè sa yo epi nou pa kapab egzante oswa rembouse yo, menm si lòd la retounen tounen vin jwenn nou.Yon fwa nou resevwa ak konfime atik retounen ou a, nou pral voye yon imèl ba ou pou fè ou konnen ke nou te resevwa atik retounen ou a. Nou pral tou fè ou konnen apwobasyon oswa rejè rembousman ou.Si ou gen nenpòt pwoblèm konsènan pwosesis rembousman an, tanpri kontakte nou. service@roymall.com oswa Whatsapp: +8619359849471Experience the Earliest Steam Engine:
The steam rotating ball was the earliest steam engine. The steam ball, also known as the Aeolipile, was invented in the 1st century AD by the ancient Greek mathematician Hero of Alexandria. It was the prototype of the steam engine, which used the reaction force of a jet of steam to drive an object to rotate. Prepare yourself for an immersive experience that unveils the marvels of this groundbreaking revolution and its profound influence on the development of human ingenuity.
Visual and Tactile Engagement:
A hollow, spherical vessel adorned with two opposing sets of nozzles, connected to a source of heat via a sealed pipe. As the water within the sphere is heated, steam is generated, which escapes through the nozzles, creating a reactive force that causes the sphere to rotate on its axis. This hands-on encounter will allow you to tangibly connect with the transformative power of steam technology in its nascent form.
Specification:
Brand:NIKOLATOY
Product Name:Rotating Flying Ball Steam Engine Model
Product Color:Silver/Black(Optional)
Material:Metal
Features:
1. Reconstruct Ancient Engineering: Immerse yourself into the world of ancient engineering with this model steam engine kit. The Hero Steam Engine, invented in the 1st century AD, is recreated in this kit for you to understand the earliest known steam engines and rotary motion principles.
2. STEM Learning Tool: The steam engine toy acts as an engaging STEM tool that allows users to learn the fundamentals of steam propulsion and rotary motion through interactive gameplay.
3. Durability and Safe: The steam engine model is crafted using high-quality aluminum alloy, brass, and stainless steel, ensuring the kit can withstand the heat and excitement of steam-powered demonstrations, ensuring safe and long-lasting use.
4. User-friendly Design: The model engine kit is designed for simplicity with intuitive instructions and pre-cut components; users can easily assemble and operate this historic model.
5. Ideal Educational Gift: Whether it"s for educational purposes or a unique addition to a collection, this mini steam engine is a perfect gift for science and history enthusiasts.
Package included:
1 x Rotating Flying Ball Steam Engine Model