| 标准编号 | MIL-STD-421B (NOTICE 1) |
| 标准名称 | MILITARY STANDARD: CHAIN, ROLLER; POWER TRANSMISSION AND CONVEYOR, FLAT LINK PLATES; BASE PITCH, SINGLE AND MULTIPLE STRAND; CONNECTING LINKS AND ATTACHMENT LINKS (28 FEB 1978) [S/S BY ANSI-B29.1] |
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