Complex sentence: In 1975 Pegas produced the first bicycle for children under 10 years and the first bike room, and then in the' 80s series Pegas diversified, multi-speed bicycles appear, including 1027 champion Pegas has five speeds.
Split into simpler sentences: In 1975 Pegas produced the first bicycle for children and the first bike room. In the 1980s series Pegas diversified, multi-speed bicycles appeared, including 1027 champion Pegas having five speeds.