PDC nrog tuab pob zeb diamond txheej

PDC thaum ntxov muaj cov pob zeb diamond txheej tuab ntawm tsuas yog 0.5 hli, uas tsis muaj zog hnav tsis kam thiab tsis muaj zog. Txij li xyoo 1980s, ntau lub tuam txhab tsim khoom PDC tau nce lub ntim ntawm pob zeb diamond, nthuav cov pob zeb diamond txheej los ntawm 1mm mus rau 2mm lossis txawm tias 4mm, txhim kho qhov hnav tsis kam ntawm PDC.

Qhov no yog qhov zoo tshwj xeeb tshaj yog rau kev sib tsoo hauv cov txheej txheem abrasive xws li cov av nkos thiab cov xuab zeb, tab sis rau kev sib tsoo hauv cov txheej txheem nyuaj, cov txheej pob zeb diamond tuab heev, txawm tias hnav- tiv taus, muaj kev ua haujlwm tsis zoo thiab kev sib tsoo qeeb, ua rau lawv tsis haum rau kev siv.