A.10kPa B.15kPa C.20kPa D.30kPa
A.175~205mm B.175~190mm C.175~215mm D.150~205mm
A.必須 B.先性能試驗(yàn)后再做 C.只做性能試驗(yàn)而不做 D.一般應(yīng)做