弹性体改性沥青防水卷材延伸率试验夹具间距离为（),夹具宽度不应小于50mmA.150mmB.210mmC.200m

弹性体改性沥青防水卷材延伸率试验夹具间距离为(),夹具宽度不应小于50mm

A.150mm

B.210mm

C.200mm

D.190mm