全免费a级毛片免费看_老熟女与小伙偷欢视频_在线观看国产精品普通话对白精品_河南妇女毛深深bbw


Promise one

For full-rotation casing, the casing joint group breaks within 50 meters of buried depth during use. If the casing cannot be taken out, the buyer will refund the total amount of the casing for the purchase of the casing.

Promise two
For the rotary digging casing, the supplier is responsible for guiding the construction of 1-2 piles into piles on site. The buyer shall strictly follow the specific operating procedures during operation and use. If all consequences caused by improper operation, the buyer shall Responsible.
The supplier shall be responsible for the fracture of the casing and the deformation of the casing joint during use.