* Work at the carpenter's workshop * Prepare materials.
Chipping of the concrete surface casing above vas
* installing formwork tube vas a
* installing formwork wooden cover pipes success.
* Concrete cover, vertical access shaft pipe.
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)