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.
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;
该品目不包括用金属线和金属网加固的石棉垫圈和石棉连接件，这些可以归到品目6812下。
The heading excludes gaskets and joints of asbestos board reinforced with metal wire or metal gauze, which are instead classifiable in heading 6812.
该发明的目的主要是解决现在使用中的石棉垫制品所存在的问题，提高使用效果且改善工人的劳动条件减少对环境的污染。
The goal of the invention is to solve the problems existed in the use of asbestos pad, increase utilization rate, improve worker's labour condition and reduce environmental pollution.
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.
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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