service live load

• 工作活荷载

service live load的用法和样例：

例句

1. The loads on a building due to its occupancy, as well as snow loads on roof surfaces, are regarded as vertical live loads.
   由于有人居住使建筑物承受的荷载以及屋盖表面上的雪荷载都是竖直活荷载。