swan neck ventilator的意思|示意

鹅颈通风筒 ... 飞剪形艏，鹅头形艏 swan bow 鹅颈通风筒 swan neck ventilator 曲颈插座 swan socket ...

鹅颈式通风筒 ... swan cap 卡口灯座 swan neck ventilator 鹅颈式通风筒 swan neck ventilator 鹅颈形通风筒 ...

鹅颈形通风筒 ... swan neck ventilator 鹅颈式通风筒 swan neck ventilator 鹅颈形通风筒 swan neck 鹅颈形 ...