| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 1149.12-2023 | English | 544 |
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Days<=5
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Internal combustion engines - Piston rings - Part 12: Half keystone rings made of steel
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GB/T 1149.12-2023
| Valid |
GB/T 1149.12-2023
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