A.16 B.17 C.18 D.15
A.結(jié)構(gòu)參數(shù) B.性能參數(shù) C.質(zhì)量參數(shù)
A.質(zhì)量參數(shù) B.主要尺寸參數(shù) C.結(jié)構(gòu)參數(shù) D.性能參數(shù)
