| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Related Standard | Status | PDF |
| GY 51-1989 | English | 439 |
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4 days
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(FM radio transmitter to run technical indicators measuring method (mono and stereo))
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GY 51-1989
| Obsolete |
GY 51-1989
|