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2018-12-20View Original

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本帖最后由 3983596_FPPZ 于 2018-12-20 09:15 编辑 bg4.png判断题规则:1、两道题回答全错给予积极参与奖励 2 财富,回答一错一对给予奖励 4 财富,两道题回答全对给予奖励 6 财富 ;2、回答奖励每人限一次;3、每个回复限管理评分一次;4、回复后可见答案及答案解释;5、奖励在48小时内有效。 学*又拿奖,天天来逛逛 1、304和316L金属,材质化学成分主要区别是:在含碳量相同的情况下,各自含有的其他化学成分Cr、Ni等含量不同 ( ) 2、出口宽大的叶轮,切割叶轮需要斜切割外径的原因是:叶轮切割后,仍能保持轴向力平衡和良好的动平衡。 ( ) 答案:错误、错误 1、304含碳量(小等于0.08%)要高于316L (小等于0.03%) 2、保持切割后的叶轮前后盖板的流道(流线)长度尽可能相等,降低叶轮出口前后盖板处的液体,因流速差而造成的回流和漩涡损失
Reply #22018-12-20
错误 正确 好早嗯 回复仅限自己看见

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