空隙: 1.(时间上的) interval 短语和例子在工作空隙时间 in the intervals of business; 战斗空隙 intervals of fighting; interval between battles2.(空间上的) gap; space; clearance; separation; air-gap (ag); slot; [铸件] allowa
Methods of test for masonry units . part 3 : determination of net volume and percentage of voids of clay masonry units by hydrostatic weighing 圬工设施试验方法.第3部分:静流称重法测定粘土圬工设施中的空隙百分率和净容积
2.
Methods of test for masonry units - part 9 : determination of volume and percentage of voids and net volume of calcium silicate masonry units by sand filling 圬工单位试验方法.第9部分:用沙充填法测定硅酸钙圬工单位的体积空隙百分率和净容积