1000 1000二号

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Ductile Cast Iron Round Manhole Cover

Ductile Cast Iron Square Manhole Cover

Ductile Cast Iron Gully Grating & Frame

Ductile Cast Iron Gully Grating

Ductile Cast Iron Manhole Cover Export Series

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1000*1000二号

1000*1000二号

耐腐蚀性，符合环境保护的需要，可分类着色，美化城市，使用寿命长，抗冲击，抗弯耐热，耐寒，耐酸

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