Complex sentence: Development started in June 1980 and was completed in February 1985 and it has been extensively tested on the Boeing 707 and Y-7 and the overall technical characteristics are thought to be similar to the Bendix AN/APS-133/RDR-1F.
Split into simpler sentences: Development started in June 1980 and was completed in February 1985 and it has been extensively tested on the Boeing 707 and Y-7. The overall technical characteristics are thought to be similar to the Bendix AN/APS-133/RDR-1F.