The risers are attached by means of flanges, studs, and heat-resistant brass nuts.

该管的重视手段法兰，螺栓，耐热黄铜坚果。

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Yong Feng Gang, Dongguan City, Union metal products Factory specialized in producing automatic lathe, CNC lathe parts, metal axle pin, bolt, brass nuts and other metal products.

东莞市凤岗永盟五金制品厂专业生产加工自动车床件，数控车件，五金轴销，插销，铜螺母等五金产品。

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