短語詞組短語ball resolver valve seat 球形分解器閥座ball and seat valve 球形止回閥Ball seat valve 球座閥valve ball seat 止回閥球座check valve ball seat 止回閥球座check -valve ball seat 止回閥球座valve with ball seat 球座閥Solenoid valve with ball seat 球閥式電磁閥 返回 ball valve seat