Min. Order Reference FOB Price
1 Piece US$19,500.00 / Piece
Product Description
Product Description 1. APPLICATION GDL-280 is energy efficienctly. It solves the difficult problems of air DTH hammer drilling in soil layers and low construction efficiency of rotary drilling rigs for hard rock layers, gravel and pebble layers. Core drilling NQ/HQ/PQ Air drilling + DTH ...