C42500铜合金H04,H06,H08,H10,H12,H14,H15,H16成分 面议 C42500铜合金H11,TM00,TM02,TM03,TM04,TM06,TM08 面议 C42500铜合金 面议 C42500铜合金TM10,R420,R410,R440,R460,R480,R490 面议 C42500铜合金R200、R220、R290、R360、R250、R280、R300、R230 面议 KAISER7050-T7451航空铝合金KAISER7050-T74511圆棒薄中厚管板化学成分 面议