Home / Standards / GB/T 29484.509-2019 GB/T 29484.509-2019 Active 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 Standard Type GBT ICS 47.020.60 CCS U60 Status 现行 Issue Date 2019-06-04 Implementation 2020-01-01 Responsible Dept 国家标准委 Drafting Unit N/A