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HFG系列测力计是小型手持式数字测力计，质量可靠。
The HFG series is a pocket sized hand held high quality digital force gauge.
youdao
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SY1型系列井下压力计，是一种弹簧管式井下压力计。
SY1 series downhole pressure gauge is made of spring tube.
youdao
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SY1型系列井下压力计，是一种弹簧管式井下压力计。
SY1 series downhole pressure gauge is made of spring tube.
youdao