IF BACKPACK/DUFFLE BAGS ETC., THE LOAD BEARING STRAPS MUST BE FLAG STITCHED IN PLACE TO ENSURE THAT THEY DO NOT BREAK UNDER STRAIN.是什么意思_IF BACKPACK/DUFFLE BAGS ETC., THE LOAD BEARING STRAPS MUST BE FLAG STITCHED IN PLACE TO ENSURE THAT THEY DO NOT BREAK UNDER STRAIN.在线翻译_英语_读音_用法_例句