What does the letter letter on the copper gate valve mean?
BVR, RV, RVV, not those projects with large cross section cable B series classification belongs to the wire cloth, so.
BVV, poly ethylene dew sheathed copper wire, two wire; BVVB poly vinyl sheathed copper wire exposed, three wire; when asked on the BV flat wire market.
In terms of VV wire refers to the two layer of poly ethylene polymer gel BV gel; vinyl insulated copper wire, single core wire;
