Kusiyana Pakati pa Cement Retainers ndi Bridge Plugs
Kubowola & Kugaya Njira Yabwino Kwambiri: Ngati zinthu zili bwino pobowola kapena mphero (chigayo chopanda kanthu), njira yoyenera ndi iyi: Gwiritsani ntchito tricone Bit(IADC Bit Codes 2-1, 2-2, 2-3, 2- 4, ndi 3-1) - mapangidwe olimba apakati. PDC Bit si ...
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