Complex sentence: The Wan Cheng 3 had mounted a "Worker Bees IV MLRS" (工蜂四型多管火箭), a Multiple Launch Rocket System (MLRS), and the MLRS was later mounted on 6 more US made M113s.
Split into simpler sentences: The Wan Cheng 3 had mounted a "Worker Bees IV MLRS" (工蜂四型多管火箭), a Multiple Launch Rocket System (MLRS). The MLRS was later mounted on 6 more US made M113s.