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 control part oftube expander adopts the structure of double bearings.它的控制部分采用双轴承结构.Object...
On the other hand, prepared negative plate expander is commercially available.另一方面, 在商业上可购到现成的负极板膨胀剂.Nagative expander formulas started to include such items of wood, as wood dust or wood flour.负极板膨胀剂配方开始包括木质一类的材料, 如木屑或木...