必一运动「中国」官方网站 - 快乐运动,运动点燃生活-必一运动

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Group Industry

Group Industry

Group Industry

Rubber and plastic machinery

Metallurgical equipment

Microfiber material

Optical materials

Optoelectronic materials

Polyurethane resin

Chengde Steel Plant 600,000 tons rod and wire production line

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