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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 1889-2009 |
The Requirements of Hearing Aids Compatibility and Measurement Methods for Telephone Handset 手柄电话助听器耦合技术要求和测量方法 |
China Telecommunication
Standards Hands the |
 English PDF |
| TB/T 3026.4-2002 |
The digital conference telephone handset distributor technical requirements and test methods 数字会议电话 话筒分配器技术要求和试验方法 |
China Railway & Train
Standards Hands the |
English PDF |
| QB/T 1900-1993 |
(Hands with the size range) 表针配合尺寸系列 |
China Light Industry
Standards Hands the |
English PDF |
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