? ? ? ? ? ?? foundation drilling trenching and piling cutter bits ???????? ? Product Description?? ? ???????Foundation?drilling?tools,?which?can?keep?excavating?in?the?adversity?of?conglomerate,?boulders,?laccoliths?and?steels,?are?mainly?applied?in?drilling?and?excavating-related?projects,?such?as?building?foundation,?bridge?and?road?construction.?They?have?made?a?great?contribution?to?infrastructure?construction?in?China. ? Packaging & Shipping ?? .standard seaworthy package, or according to your needs .specialized logistics team .punctual delivery ? Our Services .one-stop service throught the whole order .whole set of inspection records to ensure product quality ? Company Information ?? Techgong??devotes?itself?to?serve?golablly?mining?and?civil?constrution.Based?on?Shangdong?Techgong,? Techgong?Shanghai?provide?mining?bits?for?underground?mining?and?serface?mining,?civil?construction? drilling?bits?for?auger?drilling?and?trenching,?road?milling?bits,?TBM?cutters,?rock?drilling?tools,?socket ?spanner?for?automobile?service.... ? ? FAQ ? .factory,specialized in geological equipment spare parts for 15 years .advanced CNC,cold forging equipment, inspection equipment .worker's training ? ? ?