A.1:0.75~1:1.00 B.1:1.00~1:1.25 C.1:0.50~1:0.75 D.1:1.25~1:1.50
A.安全技術 B.質量規(guī)章 C.質量管理 D.質量保證
A.800N B.900N C.1000N D.1100N