wet pit pump 湿坑泵

wet-pit pump 排水泵

dry-pit pump [机] 干坑泵

dry pit pump coupling 干坑泵联轴器

pit pump coupling 矿井泵联轴器

dry pit pump 干坑泵

fuel pit pump 燃料水池泵

wet pit pump coupling 湿坑泵联轴器

pit barrel pump 矿井筒袋泵