Russian translation: Проверка контакта при помощи краски
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English to Russian translations [PRO] Tech/Engineering - Ships, Sailing, Maritime / Steering Gear
English term or phrase:blue fit test
The following is a complete subsection from a Rolls-Royce Steering Gear User Manual. No additional information or broader context available.
3.2.5 Rudder stock
The cylindrical rudder stock simplifies the manufacturing and eliminates the blue fit tests and allows for rudder stock height adjustment.
Accurate length of rudder stock is not required.
Spent over an hour trying to google out the term but all in vain. Does anyone know what it means?