What is the price of remote letter Dg500 of pneumatic ventilation regulating butterfly valve? (5) When there are many times of opening and closing, it is necessary to manually open the turbine case cover to check whether the grease is normal. It is necessary to ensure a proper amount of grease.
、 It is also a reminder that when purchasing electric on-off butterfly valves, we should not be greedy for low prices and delay things. It is more convenient for everyone to choose and purchase high-quality products after knowing the knowledge.
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