比较了电子式和机械式压力控制器各自的优缺点，并提出了选择设计方案的原则。
Merits and demerits between electronic and mechanical controllers are compared, and principle of selecting design scheme is presented.
该播种机由变量控制器控制机械式无级变速器，根据GPS的位置信号，完成处方图设计的播种施肥作业。
It could be accomplished sowing work prescribing by the application maps based on the GPS signal under the control of mechanical variable speed unit.
为了弥补机械式凸轮控制器存在的众多缺点，利用欧姆龙系列plc的高速计数器设计了可编程凸轮控制器。
A programmable CAM controller, which will not have the disadvantages of a mechanical CAM controller, was designed based on the high-speed counter of Omron PLC.
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