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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 29484.509-2019 |
Electrical installations in ships—Part 509: Operation of electrical installations 船舶电气设备 第509部分：电气装置操作 |
China National Standards 509: |
 English PDF |
| GB/T 16656.509-2010 |
Industial automation systems and integration - Product data representation and exchage - Part 509: Application interpreted construct: Manifold surface 工业自动化系统与集成 产品数据表达与交换 第509部分：应用解释构造：流形曲面 |
China National Standards 509: |
English PDF |
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