Top 10 enterprises of self drilling screws in China.

Handan Shuangzi Hlau khoom Co., Ltd yog ib tug kws tsim tshuaj paus ntawm drilling ntsia hlau thiab tapping ntsia hlau qhauj. Txij thaum nws cov tsev lag luam, cov tuam txhab tau raug tsom rau hauv qhuav thiab R & D ntawm drilling ntsia hlau, uas tau ua ib tug niaj hnub, muaj txuj, teev, ntau yam ntawm kev ntau lawm kab ntawm laum tus Tsov tus tw cov ntsia hlau. Tag nrho cov siv khoom yog mas los ntawm lub teb chaws Yelemees, Nyiv thiab Taiwan, nrog ib tug txhua xyoo tso zis zoo, multi-ntau yam laum tus Tsov tus tw muaj hau ntswj .Tus ua hauj lwm rau sab saum toj domestic Technologist, nyob rau hauv hexagon-shaping, clipping, xov-dov, carburize, zinc plated, tshuab ntxhua khaub ncaws tshuab, pob thiab lwm yam dab, txhua txhua link sib zog rau perfection thiab qhov zoo tshaj plaws.