严禁装上阀门后施焊法兰·法兰两边加石棉垫片。

Forbid welding the flange after installing the valve. Both sides of the flange should be added the asbestos gasket.

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PNN神经网络；LVQ神经网络；SOM神经网络；非石棉垫片；分类；

PNN network; LVQ network; SOM network; the non-asbestos gaskets; classification;

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打开锅炉的前后烟箱门，检查密封垫片及烟垢，以决定是否更换和清理，同时检修浇注的耐火混凝土和密封石棉垫（绳）；

Open the smoke chamber of boiler; check the seal patch and smoke dirt to decide if it needs to clean up or replacement.

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打开锅炉的前后烟箱门，检查密封垫片及烟垢，以决定是否更换和清理，同时检修浇注的耐火混凝土和密封石棉垫（绳）；

Open the smoke chamber of boiler; check the seal patch and smoke dirt to decide if it needs to clean up or replacement.

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