本实用新型涉及一种端面密封手动三位四通换向转阀。
The utility model relates to an end-face sealed manual three-position four-way reversing rotary valve.
电动三位四通阀是货船在装卸货物和作业时调整船舶横倾的专用设备，过去都是从国外订购。
Electric three-potential four-way valve is a special equipment for ship heeling adjustment during cargo handling operation on cargo ship. It was purchased from foreign countries in the past.
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