Home / Standards / GB/T 14521.7-1993 GB/T 14521.7-1993 Abolished Terms of conveying machinery--Screw conveyor 运输机械术语 螺旋输送机 Standard Type GBT ICS 53.040.10 CCS J81 Status 废止 Issue Date 1993-06-10 Implementation 1994-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A