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Double Enosis：塞岛两族分别与希土统一

double deflation method;双重缩减法;; | Double Enosis;塞岛两族分别与希土统一;; | double entry;复式记账;;

double epitaxy：双外延工艺

double epi process 双外延工艺 | double epitaxy 双外延工艺 | double heterojunction 双异质结

double epitaxy：双外延工艺WcF中国学习动力网

double epi process 双外延工艺WcF中国学习动力网 | double epitaxy 双外延工艺WcF中国学习动力网 | double heterojunction 双异质结WcF中国学习动力网

double-deck exhaust box：双层排气箱

double-deck bus 两层公共汽车 | double-deck exhaust box 双层排气箱 | double-deck machine 两层拔丝机

double offset expansion "U" bend：双偏置U膨胀弯管

Double jacketed gasket|双夹套垫片 | double offset expansion "U" bend|双偏置U膨胀弯管 | Double offset expansion "U" bend|双偏置U膨胀弯管

double offset expansion "U" bend：双偏置U型膨胀弯管

双夹套垫片 Double jacketed gasket | 双偏置U型膨胀弯管 Double offset expansion"U" bend | 双面U形坡口 Double U groove

double offset expansion "U" bend：双偏置U形膨胀弯管

double module damper 双模数挡板 | double offset expansion U bend 双偏置U形膨胀弯管 | double paddle mixer 双轴搅拌机

double offset expansion U bend U：形回弯补偿管

double nuclear resonance magnetometer 双重核共振磁力仪 | double offset expansion U bend U形回弯补偿管 | double orientation 双取向

double expansion engine：二次膨胀式蒸汽机

double ended wrench 双头扳手 | double expansion engine 二次膨胀式蒸汽机 | double helical gear 人字齿轮

double expansion engine：双级膨胀蒸汽机

double equal-angle cutter 对称双角铣刀 | double expansion engine 双级膨胀蒸汽机 | double extension motor 双凸轴电动机

propanone oxime：丙酮肟

propanone hydrogensulphite丙酮合亞硫酸氫鹽 | propanone oxime丙酮肟 | propanoyl chloride丙酰氯

underweight：不合标准的重量重量不足的

underway 在航在航的 | underweight 不合标准的重量重量不足的 | underwirter's guarantee 保险人保证书