An oxygen -supply pipe and suction tube are settled on the bottom and side of tongue-spatula to provide oxygen and absorb phlegm simultaneously on exposure of glottis.
在镜片的下侧和背侧，分别装有供氧管和吸痰管，可在暴露声门的同时供氧和吸痰。
The material selection and service condition for high temperature hydrogen exposure piping and furnace pipe was analyzed for one chemical plant imported from Japan.
本文分析了某化工公司从日本引进的苯加氢装置高温高压临氢管道及加热炉炉管的选材以及运行情况。
The material selection and service condition for high temperature hydrogen exposure piping and furnace pipe was analyzed for one chemical plant imported from Japan.
本文分析了某化工公司从日本引进的苯加氢装置高温高压临氢管道及加热炉炉管的选材以及运行情况。
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