HG/T 20615  法兰盖 BL 100-150 RFя▐Б√└п▒Б┬≥ц╥п©Б√▓п▒Б√═Б■─п▒Б┬ Б■╛я▐Б■°п▒Б┬≥Б√⌠п©Б√▓п▒Б√═Б■─п▒Б┬≥Б√⌠п©Б∙╔п▒Б