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级差 级间压差 级压头
stagehead  detail>>
差级联
differential concatenation  detail>>
外差级
heterodyne stage  detail>>
像差级
order of aberration  detail>>
差级同步机
differential synchro  detail>>
等差级数
ap arithmetic progression arithmetic series arithmetical progression arithmetica...  detail>>
反差级别
contrast grades  detail>>
误差级数
error series  detail>>
等差级数因数
arithmetic series factor  detail>>
级间压力
interstage pressure  detail>>
等差级数;算术级数
arithmetic progression arithmeticprogre ion  detail>>
等差数列(等差级数)
arithmetic progression  detail>>
容许误差级限度
acceptable defect level measure  detail>>
算术级数, 等差级数
arithmetical progression  detail>>
算术级数,等差级数
series  detail>>
等差级数定额序列因数
arithmetic series uniform series factor  detail>>
肺泡与口之间压差
pressure difference between alveoli and mouth  detail>>
压差 压力水头 压头 水位差
pressurehead  detail>>