loading door造句

State of railway vehicles - passenger area - part 7 : loading doors - type of construction : sliding plug doors , sliding doors , roller loading doors , folding doors
铁路车辆的状况.乘客区.第7部分:装货门.结构类型:推
State of railway vehicles - passenger area - part 6 : end doors doors between coaches - type of construction : folding doors , sliding doors , roller loading doors , hinged doors
铁路车辆的状况.乘客区.第6部分:客车之间的后门门
It's difficult to find loading door in a sentence. 用loading door造句挺难的