It proposes six impulse components which can develop hydraulic crawl and analyses them qualitatively.

Fault tree research on the hydraulic cylinder creeping of the automobile crane;

At the same time,based on the construction characteristics of core-tube structure,many technologies are introduced including hydraulic climbing formwork technology,grade-separation climbing formwork construction technology and .

1 for the Suzhou-Nantong Bridge,the system of hydraulic climbing formwork and the technological construction process are expounded in the paper and some methods are proposed for handling any problems cropped up during the use of the climbing formwork system.

Taking the Guangdong Provincial Public Security Bureau s central control project construction as an example, there are the comprehensive descriptions about hydraulic climbing formwork s features, structures.

The crawler design of the horizontal well production logging

Proposes the main points and control measures for the testing quality of X radiographic crawler for the pipeline, including qualification of radiographic testing, material management, equipment management, establishment oftestingtechnological specification and testingprocess control, etc.

A bogus crawler is invented,which collects information by the normal search engines,so that the search-area is wider than the normal search engine.