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357.5 KB2023-04-25
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1.61 MB2020-12-14
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42.12 KB2020-11-30
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[国外标准] SAE ARP 1962A-1995 TRAINING AND APPROVAL OF HEAT-TREATING PERSONNEL
32.59 KB2020-11-30
[国外标准] BS 1580-1 2-1962 Specification for Unified screw threads — Parts 1 2 —iameters 14 in and larger
1.36 MB2020-11-28
[国外标准] BS 3447-1962 Glossary of Terms used in the Glass Industry
4.54 MB2020-11-28
[国外标准] BS 2A 57-1962 Specification for steel hexagonal-headed shear bolts (B.S.F. threads) for aircraft
765.86 KB2020-11-27
33.87 KB2020-11-25
729.23 KB2020-11-09
442.62 KB2020-11-01
7.23 MB2020-05-23
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91.11 KB2020-01-09
732.03 KB2019-11-30
196.88 KB2019-11-29