Ddz - series process electronic control system . force balance differential pressure transmitter Ddz -系列电动单元组合仪表.力平衡式差压变送器
The paper changed scb - ltype single - chip computer and equipped ddz - 11 type control valve solved the problems with experiment under the present condition 本课题对scb - 1型单片机进行改造，配置ddz -型控制阀门，较好地解决在实验室现有条件下的实验问题。
Natural gas is a kind of important chemical raw material and clean energy sources . the volume measurement of standard orifice is a major way in trade . instead of the mechanical measurement , the ddz instrument method is being widely used 作为重要的化工原料和清洁能源天然气，在贸易交接过程中的计量目前以孔板差压式流量计测量体积流量为主，测量方式正大规模地由机械式向电动单元组合式发展。
Natural gas is a kind of important chemical raw material and clean energy sources . the volume measurement of standard orifice is a major way in trade . instead of the mechanical measurement , the ddz instrument method is being widely used <中文摘要> =作为重要的化工原料和清洁能源天然气，在贸易交接过程中的计量目前以孔板差压式流量计测量体积流量为主，测量方式正大规模地由机械式向电动单元组合式发展。
Electric o - type cutting ball valve applies to industral control system , it forms a complete set with model ddz - ii or iii instruments to realize cut or flow - thru of meduim in transporting pipe for petroleum , chemical industry , paper - making , metallurgy , pharmacy sewage treatment and etc . industrial departments 电动o型切断球阀用于工业控制系统中,它与ddz - ii型或iii型仪表配套使用,可实现对石油.化工.造纸.冶金.制药.污水处理等工业部门,输送管道内介质切断或流通
