Cable e.g. electrical line, reel pit for use in hospital, has frame whose upper areas are over-paved by lowering device to adjust frame, and cover rotated during mounting, until its edges correspond to its arrangement of space linings

摘要

The pit has a cover frame with inner rectangular and outer ball-shaped frames, where a cover is introduced into the frame. The rectangular frame is hoisted up to a street upper surface while other parts of the frame are lowered. Upper areas of the frame are over-paved by a lowering device to adjust the frame. The cover is rotated for a long time during mounting, until its edges correspond to its arrangement of space linings.