【評論主題】45A fire extinguisher consists of a hand-held _____ pressure vessel containing an agent which can be

【評論內容】滅火器由一個手持圓柱狀的壓力容器組成，容器中含有一種可以排出滅火劑。

【評論主題】45A fire extinguisher consists of a hand-held _____ pressure vessel containing an agent which can be

【評論內容】滅火器由一個手持圓柱狀的壓力容器組成，容器中含有一種可以排出滅火劑。