DF57AH-5S-1.2C DF57AH-2S-1.2C(15) DF57-6S-1.2C(09) DF57-6S-1.2C DF57-6P-1.2V(21) DF57-6P-1.2V DF57-5S-1.2C(09) DF57-5S-1.2C DF57-5P-1.2V(21) DF57-5P-1.2V