例句與造句

1. :threading operations include a ) all types of external and internal thread forms using a single point tool also taper threads, double start threads, multi start threads, worms as used in worm wheel reduction boxes, leadscrew with single or multistart threads . b ) by the use of threading boxes fitted with 4 form tools, up to 2 " diameter threads but it is possible to find larger boxes than this.
2. It's difficult to find multi start in a sentence. 用multi start造句挺難的