万杰精密配件，电子元器件与紧固系统品牌分销商！
Helical Tanged有尾螺纹护套(有尾钢丝螺套)
Helical Tangless无尾螺纹护套（无尾钢丝螺套）
Helical 8-Pitch
Helical Oversize & Twinsert
Helical Pipe Thread
Helical Self-Tapping
Helical Spark Plug
