B BACK COVER FRONT  后搭前

back cover concrete  封底混凝土

BACK COVER FRONT  后搭前

Back Cover Guard  后罩板

back cover package  后盖封装

back cover plate  后盖板

Failure to back cover  封底失败

lock bar of back cover  後盍开关锁

TV back cover  后机壳盖板

Top Cover， Bottom Cover， And Cover Board  顶盖、底盖、盖板

angles back to back  背对背角钢

Back filling at abutment back of Bridge or culvert  桥涵台背回填

back reaming and back transportation  反扩反输

back to back  背至背; 背靠背; 背对背

back to back arrangement  背对背配置

Back to Back Bus  背板总线

Back to back charter  转租合同

back to back connection  背向接线; 背对背连接

Back to Back Converter Station  背靠背换流站