铝管 3.1305 3.1325 3.1355 3.1255
铝管 3.1305 3.13..
铝管3.4415 3.433..
铝管GB-AlSi12 GB..
铝管 GB-AlSi10Mg..
铝管GB-AlSi6Cu4 ..
铝管GB-AlSi9Mg G..