Drought resistance resistance
Back filling at abutment back of Bridge or culvert
back reaming and back transportation
Back-to-Back
对头拼接
背靠背
背对背的
背靠背结构
背对背
紧接的
背向式计数器
abrasion resistance and cavitation erosion resistance
capacity of shear resistance or cross-section of shear resistance capacity
Cavitation Resistance and Abrasion Resistance
electric resistance thermometer [= electrical resistance thermometer
Thin workpiece with abrasion resistance and compression resistance
(pressure)gauge with back connection