?黑退火钢丝

... 中间退火 annealing in process; annealing-in-process; commercial annealing; inter process annealing; interprocess annealing; interannealing; intermediate annealing; intermediate softening; interstage annealing; processannealing 黑退火钢丝 black annealed iron wire; black annealed wire 退火钢丝 annealed wire; stone dead wire ...