Top 10 enterprises of self drilling screws in China.

Handan Shuangzi Products uamea Co., Ltd o se gaosi oloa tomai faapitoa o viliina faovilivili ma tapping pisinisi faovilivili. Talu mai lona faavaeina, o le ua le taulai atu kamupani i luga o le tuuina atu ma le R & D o faovilivili viliina, lea ua fausia ai se aso nei, tulaga maualuga, fua, eseese tomai faapitoa laina tuuina atu o aoaoga faovilivili siʻusiʻu. ua faaulufale meafaigaluega faaaogaina uma mai Siamani, Iapani ma Taiwan, faatasi ai ma se galuega faatino faaletausaga o le tulaga maualuga, eseese eseese auvili siʻusiʻu faovilivili .The faafaigaluegaina le technologist aiga pito i luga, i tafaono-mamanuina, clipping, filo-e tulei ai, carburize, metala paʻepaʻe plated, washer masini, pusa ma isi faagasologa, taumafai sootaga uma mo le atoatoa ma le lelei.