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優(yōu)勢供應Wilcoxon振動傳感器PCC421VR-20-R6技術參數(shù)
優(yōu)勢供應Wilcoxon振動傳感器PCC421VR-20-R6技術參數(shù)
丙烯酸在精細化工領域占有相當重要的地位。用丙烯酸生產(chǎn)的聚丙烯和丙烯酸共聚物，被用作分散劑、絮凝劑和增稠劑等。到7年代后期，聚丙烯和丙烯酸共聚物又應用于高吸水樹脂和助洗滌劑。特性與危害甲基丙烯酸的侵入途徑：吸入、食入、經(jīng)皮吸收。健康危害：本品對鼻、喉有刺激性；高濃度接觸可能引起肺部改變。對皮膚有刺激性，可致灼傷。眼接觸可致灼傷，造成性損害。慢性影響：可能引起肺、肝、腎損害。對皮膚有致敏性，致敏后，即使接觸極低水平的本品，也能引起皮膚刺癢和皮疹。

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為了防止襯里變形，我們一般采取以下措施：增加法蘭和線圈盒之間的隔熱厚度，降低流體溫差減小熱擴散，使襯里內(nèi)外溫差大程度上得到改善，這樣就可以降低滲透率減緩測量管壁內(nèi)蒸汽的凝聚；此外，將聚四氟乙烯襯里厚度加厚或者更換另外形式的襯里。部電磁的干擾在生產(chǎn)現(xiàn)場存在著管道雜散電流、靜電、電磁波和磁場等干擾源。電磁流量計的流量信號很小，非常容易被外界電磁干擾，而影響了電磁流量計的正常工作。所謂的電場干擾是指，流量計測量管內(nèi)的電勢平衡被噪聲破壞后出現(xiàn)輸出信號波動異常。