RPG(recording pressure gauge)
记录式水银压力计 recording mercury manometer
记录式差示压力计 recording differential manometer
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压力记录仪是地层测试的主力仪表，包括活塞式压力计和计时器。
Pressure recorder 2uu-J containing a timer and a pressure recorder is one of the major instruments using inforimtion tests.
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