The gravity type oil - gas - water separator is the key equipment in the oilfield gathering and transportation system.

重力式油气水三相分离器是油田集输系统中的关键设备.

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The available gravity - type apparatus have some problems, such as full load, usable inertia, fatigue and noise.

重力 式 力量训练器械存在全载负荷 、 可利用惯性 、 肌肉疲劳和器械噪声等一系列问题.

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