Original title: Have you ever used these fishing methods of drill pipe and drill bit? In the process of pile foundation construction with rotary excavator big bore, the accidents of hole collapse, drill burying and drill holding occur from time to time, but the causes, accident conditions and site conditions of rotary excavator accidents are not the same, so the measures taken are not the same,...
Arabic
French
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek