Outdoor patrol clock-in machine
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I’ve seen this kind of instrument used by CNPC before; the operator holds something about the size of a pen and taps it gently on the inspection board to indicate that that area has been checked. What is this instrument? We’re looking for something like this now, but we don’t know what it’s called.
Mm-hmm, thank you. I found it on Baidu; I’ll get in touch to purchase a batch of explosion-proof ones then