不等高接触悬挂
unequal height suspension of OCS
不等长接地体技术
noneequality length earthing technology
补助接地电极
supplementary ground electrode
薄钢板焊接风管
the steel sheet welds the wind duct
不等厚板对接焊缝
butt weld with unequal thickness plates
薄壁四点接触球轴承
thin walled four point contact ball bearing
薄板焊接结构
welded thin plate
thin-plate welded structure
薄/厚板焊接机器人
thin and thick plate welding robot