煤炭招标（摆拍、Vue渲染和OBJ模型）

蒸汽机车通常会拖挂一个补水车厢。补水车厢是一种专用铁路车厢（或运煤车厢），用于存放机车的燃料（木材、煤炭或石油）和水。 蒸汽机车消耗大量燃料和水，因此需要补水车厢来确保机车在长途运行时能持续运转。 拖挂补水车厢的机车被称为补水机车。没有补水车厢、而是将所有燃料和水装载在机车自身上的机车则被称为罐式发动机

Steam locomotives often haul a tender, which is a special railroad car (or coal-cars) designed to hold the locomotive's fuel (wood, coal, or oil) and water. Steam locomotives consume large quantities of both fuel and water, so tenders are necessary to keep the locomotive running over long distances. A locomotive that pulls a tender is called a tender locomotive. Locomotives that do not have tenders and carry all their fuel and water on board the locomotive itself are called tank engines.