...代写 关键词:西门子S7-300PLC,PID,温度传感器,固态继电器 [gap=1894]Key words】 s:Siemens S7-300 PLC,PID,temperature pickup, solid state relay ...
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bulb-temperature pickup 管式温度传感器
humidity temperature pickup 温度湿度传感器
open temperature pickup 开式温度传感器
Cold shots develop from low casting temperature, and dirt spots result from pickup of sand or slag by molten metal.
较低的铸造温度会形成冷疤，熔化金属出现的沙粒或炉渣的累积会导致污点。
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