Mmodzi wa opanga Chinese Hexagon Head Flange Face Bolts, kupereka zabwino kwambiri pamtengo wopikisana, ndi DONGSHAO. Uwu ndi mtundu wamba wa bawuti womwe umagwiritsidwa ntchito kwambiri m'nyumba zosiyanasiyana zamafakitale komanso zamagulu. Imakhala ndi ulusi wa M8 × 1-M16 × 1.5, ulusi wabwino, magiredi ochita bwino a 8.89.810.912.9 ndi A2-70, ndi giredi A.
Werengani zambiriTumizani Kufunsira