石油、天然气工业用螺柱连接阀盖的钢制闸阀 闸板的磨损余量
公称尺寸
DN
磨损余量/mm
25~50
≥2.3
65~150
≥3.3
200~300
≥6.4
350~450
≥9.7
500~600
≥12.7
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