Add punctuation: The backstroke also sometimes called the back crawl is one of the four swimming styles regulated by FINA and the only regulated style swum on the back
A: The backstroke, also sometimes called the back crawl, is one of the four swimming styles regulated by FINA, and the only regulated style swum on the back.

Add punctuation: With 1 thread in each colourmaterial 4 threads work 7 htr on the upper edge between shoulder strap
A: With 1 thread in each colour/material (= 4 threads) work 7 htr on the upper edge (between shoulder strap).

Add punctuation: Threading is semiautomatic and the thread is automatically cut when you reach the end of a seam The standard package also features a practical extension table that makes working on all your sewing projects an absolute breeze
A:
Threading is semi-automatic, and the thread is automatically cut when you reach the end of a seam. The standard package also features a practical extension table that makes working on all your sewing projects an absolute breeze.