Shallow men believe in luck. Self-trust is the first secret of success. — R. W. Emerson.

肤浅的人相信运气，而成功的首要秘诀是自信。- - - - - - R。W。爱默生。

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Production R & D self-locking key switch;

生产研发自锁按键开关；

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Shallow men believe in luck. Self-trust is the first secret of success. ----R. W. Emerson.

肤浅的人相信运气。自信才是成功的首要秘诀。

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Shallow men believe in luck. Self-trust is the first secret of success. ----R. W. Emerson.

肤浅的人相信运气。自信才是成功的首要秘诀。

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