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Type 53/54H was [[introduced in 1958]], along with the [[533]] and [[543]], renamed Type H in 1959, and dropped after 1970. | Type 53/54H was [[introduced in 1958]], along with the [[533]] and [[543]], renamed Type H in 1959, and dropped after 1970. | ||
The turret attenuator was designed by [[Lang Hedrick]]'s group. | |||
{{BeginSpecs}} | {{BeginSpecs}} |