9935| 25
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高頻淬火時(shí)某些部位不想被淬火燒到,如何屏蔽 |
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點(diǎn)評
除了金屬,書上看過有用其他材料的效果跟好,,耐高溫,,陶瓷~
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點(diǎn)評
噴上去了不是還要去除,?
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