- friction-board hammer
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фрикционный молот с падающей доской
Англо-русский словарь терминов металлургии и сварки. 2011.
Англо-русский словарь терминов металлургии и сварки. 2011.
board drop hammer — noun : a drop hammer in which the ram is raised by means of one or more boards that pass between two friction rollers at the top of the hammer … Useful english dictionary
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