铝合金异形管
special tube and pipe of aluminium alloy
特轻薄异形件
special light and thin unusual shape parts
异形异纤异收缩纤维
heteroshape-heterofineness-heteroshrinkage fiber
枝叉管形件
tubular components with branches
输水管管件
water conveying pressure pipe
SRC异形柱
SRC special-shaped column