Heavy Lift MastCrane, Floating Sheerleg, Offshore Crane.
大型桅杆吊，浮吊，海洋工程吊。
2
Mastcrane is subject to the interference of diversified factors when it is running, and its security has attracted extensive attention.
桅杆起重机工作时会受到多种因素的作用，其安全性受到广泛关注。
3
Brick chimney is a kind of high-rise structures. In this essay, we use the inside-timber-scaffold system as operation area and, the mastcrane as means for up-and-down transport.