Method Large diameter oil tube and weighting rod are adopted to decrease lifting resistance of crude oil and to increase lowering-in energy of the string.

方法采用增大油管直径和下加重杆技术，来减少油流上升阻力和增大杆柱下行动力。

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The utility model has simple and reasonable structure, low manufacturing cost, flexible operation, small eject lifting resistance, high ejection altitude, long flight time and long service life.

本实用新型结构简单合理、制作成本低、操作灵活、弹射升空阻力小、弹射高度高、飞行时间长、使用寿命长。

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Strength training, done with resistance to help build muscle mass, usually includes exercises such as weight lifting or using a resistance band.

强度和耐力的训练能帮我们塑造肌肉，通常包括举重和使用拉力带锻炼。

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Instead of lifting weights he used his own body weight for resistance.

CNN: College professor goes from fat to 'Mr. Low Body Fat'