What are the IEC standard requirements and design SPC requirements for leakage of the external sealing ring of the pitch bearing 1.2.5-132?<br>2. Is this sealing ring replaceable on the tower? Please provide replacement WDI?<br>3. Is it necessary to fundamentally solve the environmental pollution and falling of hard blocks caused by serious oil leakage that cannot be cleaned up in a timely manner according to EHS requirements?
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