| 36 |
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ISO 8678 - 1988
小半圓頭矮方頸螺栓 B級(jí)
Cup Head Square Neck Bolts with Small Head and Short Neck - Product Grade B
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| 38 |
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ASME/ANSI B 18.5.2.3M - 1990
米制大圓頭方頸螺栓
Metric Round Head Square Neck Bolts with Large Head
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| 39 |
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BS 4933 - 1973
米制大半圓頭馬車螺栓
Metric Cup Square Bolts
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