Changing spark plugs, air filter, timing belt and other items from maintenance schedule may save you from costly repairs.
根据维护时间表，更换火花塞、空气滤清器、正式皮带和其他配件，这样可以节省维修费用。
It is responsible for the execution of relaying programs, maintenance of various timing functions, and communicating with its peripheral equipment.
它负责继电保护程序的执行，各定时功能的保持，以及与外部设备的通讯。
Changes the mechanical timer of Type 420B boiling sterilizer into an electronic timer and adds a display circuit so as to make its timing ocular, operation stable and maintenance easy.
将420B型煮沸消毒器的机械定时器改为电子定时器，并加装显示电路，使其定时直观、工作稳定、便于维修。
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