Plato muaj ob qho tib si khoom siv (ib leeg laum steels) thiab taper top drive khoom (Taper laum rods thiab Taper laum khoom / Knock-off laum khoom) rau koj xaiv rau me me-qhov drilling, tshwj xeeb tshaj yog rau tes tuav pob zeb xyaum. Cov cuab yeej no tseem hu ua phau ntawv drilling cuab yeej. Drilling nrog cov cuab yeej no yog qhov qub tshaj plaws rotary-percussive drilling txoj kev, thiab lawv muaj kev siv dav hauv quarrying, kub mining thiab kev tsim kho thiab lwm yam.
Txais tos koj nug
Koj email chaw nyob yuav tsis raug luam tawm. Yuav tsum tau teb yog cim nrog *