the use of sprinkler pipe and the pipe concrete (dry). the backfill. the ud0ec (KKSTS)

摘要

1. after the ceremony, so the design of steel pipe (dry and wet, including office and residential space in the "double in backfill construction of space, to ensure that the pipeline, pipeline of a double exposure of the backfill to aesthetics to solve the problem..;2. the design of the spring so that the (dry) home. the concrete in the pipe backfill construction, office and living space of sprinkler pipe with a double pipe (dry) and the zenith (height), the space is not necessary.