Said trolley (7) has a trolley body (6) and rolling wheels set within its lower part.
台车(7)具有台车本体(6)和设置于下部的滚动轮。
Said trolley (1) has a trolley body (2) and rolling wheels set within its lower part.
台车（1）具有台车本体（2）和设置于下部的滚动轮。
Said trolley (1) has a trolley body (2) and rolling wheels set within its lower part.
台车（1）具有台车本体（2）和设置于下部的滚动轮。
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