... identification, XJ-1, XJ-2, XJ-4 with four and six grooves for basic groove, wherein XJ-1, XJ-2G with two ... -3A, 4A, 5A, 6A in two, four, six for basic groove XJK-11 in one, two, four for basic groove, jointing couples of basic ... grooves for flotation machine, can be used as a ...