金属扩张网箱是以原张钢板采用新科技经切开扩张而制成，其网身愈加轻便而且承载力强。常见的铝金属扩张网是菱形孔的，其他孔型还有六角型、圆孔、三角型、鱼鳞孔等。并广泛应用于家庭、农业、修建、医药、过滤、防护、防虫、工艺品制造等。

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