Rd 39 12 644 81 english translation (deutsch, francais, italiano)

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RD 39-12-644-81 Methods of defectoscopy of brake-bands for draw-works and work over and well-servicing winches

РД 39-12-644-81 Методика дефектоскопии тормозных лент буровых лебедок и лебедок агрегатов для подземного и капитального ремонта скважин.

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