[机]?正容差

... positive absorption 正吸收 positive allowance 正容差，正留量 positive band 正带，正能带 ...

[机]?正公差

... positive acknowledge 肯定应答 positive allowance 正公差 positive amplitude modulation 正极性幅度调制 ...

?正留量

... 正片 positive 正片a.正的 positive 正留量 positive allowance ...

?余隙

余隙 clearance space; clearance volume; free distance; idle space; play; positive allowance 右中隔,右间隔 right septum ..