1) quadrantal davit
弧齿式吊艇柱
2) quadrant davit
弧齿形吊艇柱
3) welin type
弧齿型吊艇柱
4) quadrant blocks
弧齿形吊艇滑车
5) collapsible davit
可倒式吊艇柱
6) gooseneck davit
鹅颈式吊艇柱
参考词条