指出从改善弹簧管的材质入手来提高含硫天然气管道用压力表的寿命是不可取的。
It is not advisable to lengthen the pressure gauge service life of sulfurous gas pipeline by improving the material behavior of spring tube.
现在的车速表大多是电子式的，用LED数码管或LCD即时显示，显示更加直观。
Now the speed table is mostly electronic, use LED digital tube or LCD instantly shows, show more intuitive.
第二步：用万用表测复合管和LM 4702对散热片的绝缘电阻应无穷年夜。
Step two: measure with a multimeter and LM4702 composite pipe insulation resistance of the heat sink should be infinite.
1947年，Bell实验室创造了世界上第一个晶体管，该晶体管当时就是用锗板来制备，锗这种元素元素周期表中位于硅的下方。
The first transistor, created at Bell Labs in 1947, was made of a slab of germanium, an element one spot below silicon in theperiodic table.
1947年，Bell实验室创造了世界上第一个晶体管，该晶体管当时就是用锗板来制备，锗这种元素元素周期表中位于硅的下方。
The first transistor, created at Bell Labs in 1947, was made of a slab of germanium, an element one spot below silicon in theperiodic table.
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