CREATE TABLE table_60925 ("Class" TEXT, "Introduced" TEXT, "Number in class" FLOAT, "Number in service" FLOAT, "Power output  ( kW ) " FLOAT)

Which class has a power output larger than 700 and a class of 48?
SELECT "Class" FROM table_60925 WHERE "Power output (kW)" > '700' AND "Number in class" = '48'
SELECT "Class" FROM "table_60925" WHERE "Number in class" = '48' AND "Power output (kW)" > '700'