Complex sentence: The Welin breech was a single motion screw, allowing it to be operated much faster than previous interrupted-thread breeches, and it became very common on Anglo-American large calibre naval artillery and also field artillery above about 4.5 inches (110 mm).
Split into simpler sentences: The Welin breech was a single motion screw, allowing it to be operated much faster than other, previous, interrupted-thread breeches. It became very common on Anglo-American large calibre naval artillery and also field artillery above about 4.5 inches (110 mm).