第3题
天然气特点:密度小、粘度低,无色。可燃气体,与5%-15%的空气混合易燃,热值高。 Characteristics of natural gas: low density, low viscosity, colorless. Flammable gas, mixed with 5% - 15% air, high calorific value.
点击查看答案
第4题
天然气特点:密度小、粘度低,无色。可燃气体,与5%-15%的空气混合易燃,热值高。Characteristics of natural gas: low density, low viscosity, colorless. Flammable gas, mixed with 5% - 15% air, high calorific value.()
点击查看答案