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매일 한 문제, 정답으로 상품은 없지만 즐거움이 있습니다

2019-12-01View Original

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원통을 조작하면서 피치점이 비정상적 위치에 위치한 경우 두 기어의 원인은 ()입니다? A、축선이 기울어짐B、축선이 평행하지 않음C、중심간격이 너무 큼 昨天的问题的答案:A 8.강 안의 ()는 해로 요소입니다? A、S、P B、Si、Mn???????C、P、Mn?

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