Hermetic sealing is reliable, the filling changes but is in progress under not stop calculation situation, the convenient rapid block of wood affects systematic operation.
密封可靠，针阀填料更换可在不停机情况下进行，角阀方便快捷不影响系统运行。
Manual operation is majority in an industry, Which is not in accord with the progress of technology and equipment.
目前行业内多数还是人工操作，不符合设备技术发展趋势。
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