Min. Order Reference FOB Price
1 Piece US$300.00-3,000.00 / Piece
Product Description
Dminingwell Concentric casing system tube symmetric concentric overburden casing drilling system rock drilling bit concentric bit Size OD of casing pipe(mm) ID of casing pipe(mm) Wall thickness (mm) Center drill bit most Large outer diameter (mm) Perforated size (mm) Allow pass drill ...