Complex sentence: Bofors also developed a towable carriage which they displayed in April 1935 at a show in Belgium, which allowed the gun to be fired from the carriage with no setup required, although with limited accuracy.
Split into simpler sentences: Bofors also developed a towable carriage which they displayed in April 1935 at a show in Belgium. This mound allowed the gun to be fired from the carriage with no setup required, although with limited accuracy.