介绍汽车储能弹簧制动气室的结构及工作原理、基本性能的试验，并对试验的结果加以分析。
Described are the structure, working principle and performance test of the automobile spring brake chamber, and analysis is made of experimental results.
桥墩的抗震性能试验是桥梁抗震分析的基础性研究工作。
The test on seismic performance of bridge piers is the basic research work of the bridge seismic analysis.
介绍了系统的工作原理及优势所在，并通过一系列试验及分析，初步掌握了该种切割技术的切割性能及影响因素。
The system work principle and its advantages were introduced, and the primary cutting performance and influence factors about this technology were studied by a series of tests.
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