frequency-amplitude characteristic,幅频特征 float barograph,浮子气压计 fire resistance,耐火性 fire stability,对于火不改变性别 firmware,固件 fish finder,鱼探仪 fitting,管件 ..
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... aneroid barograph 膜盒式气压记录仪,膜... float barograph 浮子气压记录仪... siphon barograph 虹吸气压计 ...
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... float and cable level measuring device,浮标以及缆绳式液闰丈量装配 float barograph,浮子大气的压力表 float level measuring device,浮子液位丈量装配 ...
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