Conclusion Intraoperative choledochoscopic technics is useful to decrease the residual stonerate and the recurrence rate, and helps to choose the proper methods of operations.
First-rate walkers could travel to find food, water or the best stone for tools.
一流的步行者可以寻找更多的食物和水或最好的石头做工具。
3
USES material not qualified. Such as sand, stone, aggregate quality unqualified; In addition, mostly because cement volume expansion rate is too large (stability serious adverse).