Machinery . a jib crane having a boom hinged near the base of the mast so as to rotate about the mast, for moving a load toward or away from the mast by raising or lowering the boom.
Also called oil derrick. the towerlike framework over an oil well or the like.
a boom for lifting cargo, pivoted at its inner end to a ship's mast or kingpost, and raised and supported at its outer end by topping lifts.
Verb (used with object), verb (used without object)
Cơ quan chủ quản: Công ty cổ phần Truyền thông Việt Nam.
Địa chỉ: Tầng 16 VTCOnline, 18 Tam Trinh, Minh Khai, Hai Bà Trưng, Hà Nội
Điện thoại: 04-9743410. Fax: 04-9743413.
Liên hệ Tài trợ & Hợp tác nội dung
Hotline: 0942 079 358
Email: thanhhoangxuan@vccorp.vn