Industry policy "Pile
"Pile-driver," the new standard is the national standard GB/T8517-2004 "Pile-driver" (hereinafter referred to as the original standard) amendment, the manuscript was passed in June 2007 a review of the revised The new standards will also be converted to mechanical industry (JB) standard. Pile-directional vibration is generated (usually vertical vibration) is used to pull piles of […]