乙炔一般不与其他管线同沟敷设,但可与同一使用目的的氧气管平行敷设,间隔最少为(),且地沟内应填满黄砂。
A、250mm
B、500mm
C、400mm
D、300mm。
相关标签: 氧气管
A warm-hearted (热心的) nurse on her first day's work went near to a patient (病人). He has come to London as a tourist. She asked him if she could do something for him, but he only waved (摇) his hand and said something she could not understand. With a smile she asked him again and he just kept saying the same word but in a very much lower voice (声音) before closing his eyes. She ran to the doctor and repeated(重复) to him the sounds she had heard: "My dear girl," said the doctor after listening carefully to what she repeated, he was saying, " You are standing on I oxygen pipe (氧气管)!"
In the story, the nurse and the patient ______.
A.speak the same language
B.speak different languages
C.can't hear each other
氧气管弯头宜采用弯曲半径大于()D光滑弯头,不宜采用焊接弯头。
A、3.5
B、4.0
C、5.0
D、6.0
A.架空氧气管道与明火地点等之间的最小净距不应小于10mB.氧气管道与乙炔管道共架敷设时,应设在乙炔管道的下方C.氧气管道与油质管道同沟敷设时,应设在乙炔管道的下方D.氧气管道上的法兰连接和螺纹连接处,应用金属导线跨接,跨接电阻应小于0.03Ω
气焊与气割氧气胶管为()色,严禁将氧气管接在焊、割炬的乙炔气进口上使用。
A、红
B、蓝
C、紫
D、白