gravity oil tank 重力油柜
gravity oil feed 重力自流加油
gravity oil filling bearing 重力注油式轴承
oil gravity 油比重
gravity heating oil tank 重力油柜
crude oil gravity 原油比重度
gravity heating oil feed 重力自流加油
fuel oil gravity tank 燃油重力柜
gravity lubricating oil system 重力式滑油系统
fuel oil specific gravity 燃油比重
gravity oil
重力油
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Steam Assisted Gravity Drainage (SAGD) pumps steam into the ground to liquefy the bitumen and stiff crude oil, making it thin enough to be pulled out of the ground.
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