Through the redesign and revamp of the valve disk and body of rotary spindle, the technology is simplified, the cost is reduced and a large amount of foreign exchange is saved for our country.
回转接头的阀芯和阀套经重新设计和改造后，简化了工艺，降低了成本，为国家节省了大量外汇。
Through the redesign and revamp of the valve disk and body of rotary spindle, the technology is simplified, the cost is reduced and a large amount of foreign exchange is saved for our country.
回转接头的阀芯和阀套经重新设计和改造后，简化了工艺，降低了成本，为国家节省了大量外汇。
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