Home / Standards / GB 11799-1989 GB 11799-1989 Abolished Marine explosion-proof type centrifugal fans 船用防爆离心通风机 Standard Type GB ICS 47.020.90 CCS U47 Status 废止 Issue Date 1989-11-21 Implementation 1990-07-01 Responsible Dept 国家标准委 Drafting Unit N/A