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["每日 одной вопрос】Катализаторная жиглообработанные нефтехимические продукты смешивание версс

2017-04-19View Original

Thread Content

"Последед этого поста последний раз 由33887 в 22-1-4-:редедактирование для увеличения популярности этого раздела,特意举办每日一题活动,活动宗旨:"每天学一点点,十天进步一大点"。希望大家积极参与,在学与进步中还可以把财富轻松带回家:) 。参与:奖5财富;回答正确:奖1财富;注:当天的题,当天回答得满回馈,隔天回答奖
Reply #22017-04-19
A:不允许空负荷试车 
Reply #32017-04-19
对于螺杆泵( A )。 A:不允许空负荷试车   B:可以空负荷试车  C:都可以

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