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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| JJF 1430-2013 |
Calibration Specification for X-ray timers X射线计时器校准规范 |
China Metrological
Standards timers |
 English PDF |
| DL/T 566-1995 |
Technical requirements for loss-of-voltage timers 电压失压计时器技术条件 |
China Electricity & Power
Standards timers |
English PDF |
| SJ 20298-1993 |
Detail specification for types JB555 and JB556 precision timers of semiconductor integrated circuits 半导体集成电路 ｊｂ５５５、ｊｂ５５６型时基电路详细规范 |
China Electronics
Standards timers |
English PDF |
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