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Effect of Rolling-Press Pretreatment on Drying Rate and Pit Structure of Oak(Quercus mongolica)Lumber Structure of Bordered Pit Membrane of Cunninghamia lanceolata Tracheid Study on tracheary elements of three genera in Athyriaceae A STUDY ON THE MEAN EFFECTIVE RADII AND NUMBERS OF CAPILLARY IN WOOD A STUDY ON THE PRINCIPLE OF PERMEABILITY CONTROL OF WOOD Pit-Membrane Remnants in the Perforation Plate of Euptelea pleiospermum (Eupteleaceae) Vessels Electron Mitcroscopic Investigation of the Cross-Field Pit of Gymnospermous Woods STUDIES ON THE ULTRASTRUCTURE OF PITS IN MAIN CHINESE HARDWOODS EFFECT OF STEAMING ON THE PERMEABILITY OF WOOD