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控制电极 kòngzhì diànjí
el. guide electrode
therm.energ. control electrode
圆柱形控制电极 kòngzhì diànjí
earth.sc. Wehnelt cylinder
控制 电 极: 39 phrases in 8 subjects
Chemistry1
Computers1
Electronics13
General3
Metallurgy9
Oil / petroleum1
Technology10
Telecommunications1