CREATE TABLE table_34150 ("Ship" CLOB, "Original Pennant Number" CLOB, "Builder" CLOB, "Laid Down" CLOB, "Launched" CLOB, "Commissioned" CLOB)

what builder launched 20 jun 1953?
SELECT "Builder" FROM table_34150 WHERE "Launched" = '20 jun 1953'
SELECT "Builder" FROM "table_34150" WHERE "Launched" = '20 jun 1953'