It has enough energy to overcome the frictional resistance in valves and registers. 它有足夠的能量克服閥門(mén)和記錄器的摩擦阻力。
Application shows that the reformed seal has rational structure, small frictional resistance and good sealing effect. 幾個(gè)月的試運行證明，改造后的密封結構合理，摩擦阻力小，密封效果好。
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