3/4 inch ball valve specifically refers to the size of the ah? Great God pointing 5
Not counted. 3/4 is also called DN20, also called 6 points.DN20, that is to say, the caliber is 2 centimeters, so you see?.
DN20, standard parts are produced according to the national standard size, you say ordinary ball valve, if it is according to the standard size is standard
DN20 caliber equivalent to3/4 inches
