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boundary lubricant additive dolichopeza (nesopeza) tuberculifera double bassists double cylinder machine dpvs duplex wave winding embryophyta siphonogama foreshore flats gear-box instrumental variables method marinated shellfish P. C. A. pin-points plasto hydro dynamic lubrication Pribaykal'skiy Rayon retiring board saito t-like statistic uniformly better decision function v-chipper