Secondly there is error between the thread roll angles of threadrolling die and drill rod.
滚丝轮螺纹和钻杆螺纹的螺旋角有误差。
2
In 2004, "Xinggong" threadrolling machine was awarded as "Zhejiang High Quality Product" and "Xinggong" brand was regarded as "Zhejiang Famous Brand".
2004年“邢工”滚丝机获得河北省优质产品称号,同年“邢工”商标被认定为“河北省著名商标”。
3
Jieng Beeing Enterprise Co., Ltd was established in 1972. The predecessor is Taiwan Jieng Gon factory, the first flat threadrolling dies factory in Taiwan.