carbide-tipped cut-off turning tool  硬质合金焊接切断刀

demonstration unit turning-off  关断技术验证

the turning off load automatically  自动卸载

Turning off adapter booster  传爆管旋卸

turning off steam  关闭暖气

zero-voltage turning off  零电压关断

Cutting-off tools for turning with clamp tips  机夹切断车刀

time turning on and off  定时控制开/关

turning point laying off  转点测设

wheel turning lathe not needing to take wheel off the bogie  不落轮旋车床

allowable shut-off time of fast shut-off valve  快速切断阀的允许切断时间

fall off [= bear off]  撑开; 转向下风

hang off [= stop off]  [暂时]挽位; 港外短暂逗留

Off beat takes off  走板起跳

Off-Line Handwritten Chinese Character Recognition (off-line HCCR)  脱机手写汉字识别

off-line trusted third party (off-STTP)  离线半可信第三方

Off-on-off  关－开－关

one-off write-off  一次过撇帐

voltage cut off or current cut off  截压截流