zum

1. Contraction of zu dem (“to the; for the”).
2. Contraction of zu einem (“to a; for a”).

Anlegen

gerund of anlegen

einer

• Num

  genitive/dative feminine singular of ein

• Article
• Pron
• Pron

Spannung

1. voltage
2. tension
3. suspense (emotion of anticipation, excitement, anxiety or apprehension)

sind

1. first-person plural present of sein
2. second-person polite present of sein
3. third-person plural present of sein

zwei

two (numerical value represented by the Arabic numeral 2; or describing a set with two components)

Elektroden

plural of Elektrode

notwendig

necessary; essential; indispensable