head back  回去

head back fruit branch  结果校短截

back pressure test head  后试压头

back-lining and head banding machine  书脊粘纱布顶带机

The back part of the head or skull  头或颅的后部分

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

back to back diodes  背对背二极管

Back to back FX agreement  背靠背外汇协议

back to back houses  背对背房屋

Back to back ionization chamber  背对背电离室

Back to Back LC  背对背信用证