SX-6-3090国标铝型材 ¥59.80 SX-8-4040GA南京铝型材厂家铝型材价格直销轻型铝合金 ¥24.10 SX-8-4040GB ¥31.00 SX-8-4040GE ¥45.10 SX-8-4060GC ¥69.00 SX-8-4080GA ¥45.10