gas fitting 煤气装置 ; 特殊气体管路 ; 特殊气体管道 ; 燃气阀
gas fitting work 煤气安装工程
gas fitting s 煤气设备
gas-fitting 安煤气
gas fitting plant 煤气设备厂
gas type Fitting 气管接头
gas pipe fitting 安装气体输送管
gas-type fitting 气管接头
When most people think about gas masks or respirators, what they usually envision is a tight-fitting plastic or rubber face mask with some sort of filter cartridge.
大多数人想到防毒面具或呼吸器时，脑海中呈现的是一件配有某种过滤罐的、塑料或橡胶材质的密闭面具。
Through nonlinear fitting on clastic coal core gas desorption laws in Jiedong mine, compared each desorption model of the loss to the loss of volume by calculation methods.
通过对街洞矿区碎屑状煤芯瓦斯解吸规律的非线性拟合，对各解吸模式的损失量与用计算方法所求得的损失量进行了比较。
The algorithm of radiance spectra and transmittance spectra in measured region was proposed, and the method of retrieving gas concentrations with NLLS fitting algorithm was also proposed.
提出了辐射光谱、测量区域内大气透过率谱的算法模型，以及应用非线性最小二乘拟合算法实现气体浓度反演的方法。
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