Aluminum metering chamber, thread connection. Mechanical readout device with rotating wheels. subtotals an be set to zero, total readouts can not.
带手轮的机械流量表，升数可以手动回零，总累不能回零。
Aluminum metering chamber, thread connection. Mechanical readout device with rotating wheels. subtotals an be set to zero, total readouts can not.
带手轮的机械流量表，升数可以手动回零，总累不能回零。
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