HG/T 20592  法兰 WN 150-100 RF15f und/ RF S=6.3h8029S= B=9o4F30п╟п÷я┌б√б▓п╟б▒я┌б√б═я┌б∙п┌п╟б▒я┌б┬б≥я┌б√б═п╟п÷п╒п┴п╟�