Símbolos. O que é a diferença entre o símbolo A, B, C?
(ARROW) I know that the "C" arrow means "negative (-)" or even mean "GROUND"
mas e setas "A" e "B" ??
符号。符号A,B,C之间的区别是什么?
(ARROW)我知道阙的“C”指箭头“负( - )”,甚至表示“接地”
但和箭头“A”和“B”?
sorry my English is very bad and my chinese too
I am brasilian, please answer me in portuguese or english, but if you will want in chinese no problem!!