Complex sentence: On February 14 the vehicle was adopted and put into production under the KV-14 (КВ-14) designation; in April 1943 the designation was changed to SU-152 (СУ-152).
Split into simpler sentences: On February 14 the vehicle was adopted and put into production under the KV-14 (КВ-14) designation. In April 1943 was ordered KV-14 to be henceforth designated SU-152 (СУ-152).