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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| TB/T 3176-2007 |
General technical requirements for railway signal DC stepless relays {译} 铁路信号直流无级继电器通用技术条件 |
China Railway Transport Industry
Standards stepless |
 English PDF |
| JB/T 14370-2022 |
stepless drill {译} 无级钻 |
China Machinery Industry
Standards stepless |
English PDF |
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