kelly ball是什么意思

网络释义

1)kelly ball,凯氏球体贯入七2)kelly ball test,凯氏球体贯入试验3)ball-point penetrator,球体贯入度仪4)bal penetration test,球体贯入试验5)Kelvin body,凯氏体6)Proctor Needle,普氏贯入法