HG/T 20615  法兰 WN 80(B)-150 RF5-п©Б∙÷п©ц╥я▐Б■▄п╠Б√═п╠Б■▄п©Б∙÷п©ц╥я▐Б■▄п╠Б┬≥п©Б■┌п©Б∙÷п╠Б√▓я▐Б■▄п╠Б√═п╠�