Objective To evaluate the effect of U-type colonic loop substitute for colonic pouch on defecation function after anterior resection for distal rectal cancer.

During rail laying, the loop part of the U-shaped bent loop is knocked bent to hold down the foot of the rail and in this way, the sleeper and the rail are connected together.

The insulation class F or class H . The insulation of open-loop U/f condition of . structure has the adaptability to high carrie frequency voltage supplied by frequency converter .