词汇	photo beam
释义	photo beam 光子束
随便看	engine service engine service classification system engine service track engine set engine set protecting relay engine set protectiong relay engine shaft engine-shaft engine shaft speed engine shed engine-shed Engine shell engine shield engine-shipping hatch engine shop engine shorting out engine shorting-out engine shroud engine shutdown engine shut-down engine shutdown device engine shut down device engine shut off cock Engine-Shut-off-solenoid engine side control