瓦斯外洩怎麼辦 相關
廣告專門偵測危險氣體洩漏的紅外線熱像儀乙烯、丙烯及可偵測各種不同氣體。
搜尋結果
1 天前 · Methane ( US: / ˈmɛθeɪn / METH-ayn, UK: / ˈmiːθeɪn / MEE-thayn) is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas.
3 天前 · Tonga ( / ˈtɒŋə / TONG-ə, / ˈtɒŋɡə / TONG-gə; [a] Tongan: [ˈtoŋa] ), officially the Kingdom of Tonga ( Tongan: Puleʻanga Fakatuʻi ʻo Tonga ), is an island country in Polynesia, part of Oceania. The country has 171 islands – of which 45 are inhabited. [1] .
1 天前 · The history of Earth concerns the development of planet Earth from its formation to the present day. [1] [2] Nearly all branches of natural science have contributed to understanding of the main events of Earth's past, characterized by constant geological change and biological evolution .
1 天前 · Air pollution is the contamination of air due to the presence of substances called pollutants in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. [1] It is also the contamination of the indoor or outdoor environment either by chemical, physical, or biological agents ...
22 小時前 · The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, [18] [19] heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
2 天前 · The General Dynamics F-111 Aardvark is a retired supersonic, medium-range, multirole combat aircraft. Production models of the F-111 had roles that included attack (e.g. interdiction ), strategic bombing (including nuclear weapons capabilities), reconnaissance and electronic warfare.
22 小時前 · Elemental chlorine at high concentration is extremely dangerous, and poisonous to most living organisms. As a chemical warfare agent, chlorine was first used in World War I as a poison gas weapon. In the form of chloride ions, chlorine is necessary to all known species of life.
