Natural gas liquification involves both mixed - refrigerant cycle and nitrogen expander cycle.近几年国内天然气液化技术主要采用混合工质液化循环和氮膨胀液化循环.The Catalyst that is suitable for Shenhua coal liquification was found out through experiment...
Products wanted: PVC spray hoses, agricultural sprayers, sprayer nozzles and sprinklers.需要货品: PVC喷射软管 、 农业用喷射器 、 喷射管嘴及洒水器.Are there any fire hoses in the building?在这幢大楼里有消防水管吗?The trailer was connected to the car by mean...