From the air valve operating principles of view, air valve performance will directly affect the work of compressor tanks, air valve for the following requirements: resistance losses small.
从气阀工作原理来看，气阀工作性能将直接影响压缩机气缸的工作，因此，对气阀有如下要求：阻力损失小。
It also introduces the VTEC structure and operating principles of the variable valve actuation adopted by Honda company.
着重介绍了本田公司的可变气门驱动机构VTEC的结构和工作原理。
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