SANS 10120-4 LB-1983 与土木工程施工和合同文件用标准化规范同时使用的操作守则.第4部分:标准工程数量表.第LB节:垫床(管道)
Code of practice for use with standardized specifications for civil engineering construction and contract documents Part 4: Typical schedule of quantities Section LB: Bedding (pipes)