Application of self-developed check valve in large diameter drainage drilling project
In view of the problems caused by the current solid pipe technology of large diameter drilling,such as non-dense pipe and hole behind the pipe wall,the drainage pipe was installed and fixed through the developed check valve during the construction of drainage drilling in a mine,which solved the problems of non-dense pipe and more residue after the solid pipe.
large diameter drainage holecheck valveDrain pipe installationPipe fastening
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