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北京自动化仪表三厂生产的YWK—151型无触点开关压力表设计定型鉴定会于一九八二年十二月二十日至二十一日在北京召开,该仪表经一机部佳木斯防爆电
YWK-151 non-contact switch pressure gauge design stereotypes of Beijing Automation Instrumentation No. 3 Factory will be held in Beijing from December 20 to January 21, 1982. The meter is approved by Jiamusi Explosion-proof Electricity