Complex sentence: The Type 1938B were relatively small destroyers, compared with the preceding Type 1936 and 1936A ships, which were to be armed with four guns in two twin turrets, and designed for long range.
Split into simpler sentences: The Type 1938B destroyers were relatively small, compared with the preceding Type 1936 and 1936A ships. They were to be armed with four guns in two twin turrets, and were designed for long range.