Gossip Girl say: the law of affinity refers to unlikely compositions forming a bond, through a purely chemical reaction.
绯闻少女说过：异性相吸的法则就是看似绝缘的两个人，能通过化学反应从而紧密相联。
The affinity law of impeller trim for the centrifugal oil pump 65y60 is gained when pumping viscous oil.
得到了输送粘油时65y60型离心油泵的叶轮切割规律。
Nowadays, the affinity law of impeller trim for the centrifugal water pumps is applied to impeller trim for the centrifugal oil pumps.
目前，都采用离心清水泵的切割定律来切割离心油泵叶轮。
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