A.20.0mm B.25.0mm C.31.5mm D.40.0mm
A.公稱粒徑10.0mm B.公稱粒徑16.0mm C.公稱粒徑20.0mm D.公稱粒徑25.0mm E.公稱粒徑31.5mm
A.2mL B.3mL C.5mL D.10mL