Please give machine and core cutter details

ভাই এটা কি বাংলাদেশে আমার খুব প্রয়োজন মেশিন

I've worked with those pipes many, many times over the years. Why would anyone let that happen? You have to clean them out immediately. You don't let them just sit there so the concrete can harden. Guys responsible should have been fired.