pulp bolts是什么意思

用法例句

By use of this method and routine constant head permeability test,the bubbling pressure and permeability coefficient of six kinds of porous mortar of different sand fraction and mix proportion are measured.

针对进气值较低的材料提出了一种量测进气值的新方法 ,并用该法和常规的常水头渗透试验测定了 6种不同砂粒径、不同配合比的多孔砂浆块的进气值和渗透系数 。