Dab tsi yog qhov ntsia hlau pawg? Screw piles yog av anchoring system uas siv tau thaum tsim cov hauv paus loj. Cov no tuaj yeem hloov qhov nyuaj-rau-siv cement precast thiab pob zeb cam khwb cia rau hauv qhov chaw piles, uas nyuaj rau siv thiab tsis raug nqi. Screw pawg tseem tiv thaiv cov tsev lossis cov tsev loj dua los ntawm kev sib tsoo.
