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单词
standard hole
释义
standard hole
standard hole
[
′stan·dərd ′hōl
]
(design engineering)
A hole with zero allowance plus a specified tolerance; fit allowance is provided for by the shaft in the hole.
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psr
psr1
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psrab
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p/s ratio
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psraw
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psr b0531+21
psrba
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更新时间:2025/10/14 14:36:52