They are believed to be the compounds of gas and metal ions at brazing with F-from Teflon that is decomposed by radiation.

它们是辐射环境中的聚四氟乙烯降解释放的氟离子与焊缝处气体离子和金属离子反应的化合物。

youdao

Only some parameters such as theoretical A/F ratio and modified coefficients of sub models needed to modify little, when simulating the characteristics of engine using different gas.

当燃用不同的燃气时，只需对其中的一些参量（如理论空燃比等）及子模型的修正系数进行微调即可。

youdao

The optical emission spectrum of r. f. plasma during amorphous silicon based film etching in CF4 gas is detected.

用该系统检测了仅用CF4作为刻蚀气体刻蚀非晶硅基薄膜的等离子体光发射谱。

youdao

Ford, for instance, has tied its wagon for the last few years to boosting fuel economy across its spectrum of products, ranging from the new subcompact Ford Fiesta to a line of gas-sipping EcoBoost engines that has even buyers of F-150 pickup trucks grasping for big gains in fuel economy.

FORBES: Recall $5-a-Gallon-Gas Scare? That Was Soooo First-Quarter

Of the seven full-size, heavy-duty diesel pickup trucks Vincentric studied, the Ford F-350 is the only one with five year ownership costs that are lower than that of its gas-powered equivalent.

FORBES: 2012 Ford F-350 Diesel