① Cov kav dej kub thiab cov roj kub yog ruptured thiab leaked, lub cav thaiv yog corroded thiab khawb, Corrosion ntawm ntug ntawm daim ntawv tshuab ziab khaub ncaws thiab cua to ntawm lub sealing nto ntawm lub hau kawg, kho cov yas molding pwm, thiab lwm yam .; ②Cov dav hlau, flanges, hydraulic systems, threaded pob qij txha, e ...
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