HG/T 20592  法兰盖 BL 32-10 RF25-FM Sп═р²п▓б╘п═Б─≤п╡р╡р╥п╡Б─⌠Б─≤п║р╦п╡Б─²р√п═р╠п╡Б─╒п▌п═р²п▓б╘п═Б─≤п╡р