求翻译：在密封剂选择时必须要使用化学成分合格的密封胶料，防止密封剂进入系统后，对于被堵漏的设备或者是其下游设备（考虑到密封胶料可以在一个回路上的几个相连设备上流动），有可能带来功能性改变。是什么意思？

Chemical composition to be used for the selection of the sealant must be qualified sealant material, to prevent the sealing agent into the system, for plugging devices or downstream devices (taking into account the sealant material can be connected in a loop several devices on flow), it is likely to

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Chemical constituents in choosing sealant must be able to use qualified sealing compound to prevent the sealant into the system after, for devices or plugging their downstream devices (taking into account the sealant in a several connected devices on the circuit flow), has the potential to bring abo

When aquaseal choice must have to use the chemical composition qualified seal sizing material, after prevented the aquaseal enters the system, regarding is stopped up the equipment which leaks or is its downstream equipment (considered seal sizing material may flow in on return route several connect