common wire
... common wiper 共用接帚，共用弧刷 common wire 公共导线，中性线 commotion 电震，扰动，动摇 ...
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表中双接点连接导线为：接点2为下限设定点，接点1为上限；设定点，接点3为公共端。
Leads of single double contacts: lower limits is contact 2, upper limits setpoint is contact 1, contact 3 is public port.
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在转换时间，这允许在1导线公共汽车的其他数据量。
This allows other data traffic on the 1-wire bus during the conversion time.
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