调整，修复或更换卡车拖车系统零部件，包括结构，刹车系统和电气系统。
Adjust, repair or replace parts and components of truck-trailer systems including structural, brake and electrical systems.
调整，修复或更换卡车拖车系统零部件，包括结构，刹车系统和电气系统。
Adjust, repair or replace parts and components of truck-trailer systems including structural, brake and electrical systems.
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