CB/T 4444-2017
船用菌形通风筒
Marine mushroom ventilators
2017-04-12
CB/T 3467-2013
船用轻型菌形通风筒
Light-weight mushroom ventilators for ship
2013-07-22
CBM 1124-1982
船用筒形观察器
Marine cylindrical sight glasses
CB/T 3965-2005
船用半球形通风筒
Ships and marine technology -- Positioning of magnetic compasses in ships
2005-04-11