friction pressure drop 摩擦压力降
friction press drop gradient 摩阻压降梯度
friction resistance pressure drop 摩阻压降
drop friction
减少摩擦
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Should be larger port area to ensure less friction and pressure drop across the valve.
较大开口区域应保证通过阀门较小的摩擦力和压力降。
youdao
The friction is simply that some students who were choosing to drop out may choose to continue on in college without putting in effort (there is no change in their college effort decision).
FORBES: A New Market: Student Loan Insurance
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