冲落式坐便器
wash-down type water closet
Wash-down toilet
冲水式坐便器
wash-out type water closet
胶木坐便器座
bakelite seat for toilet bowl
坐便器胶木盖
bakelite cover for toilet bowl
封隔器坐封液压控制管
packer setting control line
深海应答器坐标
calibrating coordinates of transponder in deep ocean
calibrating coordinates of transponder in deep oce