词汇	shell drill
释义	shell drill 筒形钻,壳形钻,套式扩孔钻
随便看	picture synchronization transmission system picture synchroniza-tion transmission system picture synchronizing impulse picture synchronizing impulses picture synchronizing pule picture synchronizing pulse picture-synchronizing pulse picture synchronizing ratio picture synchronizing signal picture sync pulse picture synthesis picture system picture taking picture-taking picture taking lens Picture taking machine picture takings picture-takings picture taking wavelength picture-taking weather satellite Picture Talking Material picture tearing picturetel picture telegraph picture telegraphy