Detailed force analysis when loading and unloading container has been made by establising a mathematic model of telescopic hooklift, Which establishes the basis for dynamics analysis and finite element analysis.

Based on the application condition and the character of the similar device, a safety accommodation ladder, which can flex, fold and lift automatically, can be electric and manual operated, is designed for medium or small sized watercraft to berth at a wharf in storm or in ebb and flow by the use of the Pro/E and ANSYS.

Firstly the introduction of collecting high-tree fruits in alien was made ,according to the actual condition and the requirement of collecting fruits in china,a new type of machine which can collecting high-tree fruits flexiblely was desighed, and the structure parameter of the machine was confirmed .

According to several shifting,long circulation time of hoisting,restricting production and affecting safety badly in the mine of nonyielding cage guide multi level hoisting,the way of ZHT cage-supported damping swing-deck with automatic changing floor cooperate with germanic flex cage guide is pointed out.