There must be good support for the mast, jib boom attachment, and other fittings.

必须有良好的支持桅杆，臂景气实习，及其他配件。

youdao

There must be good support for the mast, jib boom attachment, and other fittings.

必须有良好的支持桅杆，臂景气实习，及其他配件。

youdao