在北美，PVC的主要用途按重要性排列为管道、建筑材料、消费产品、包装纸和电器产品(比如电线和电缆绝缘)。
The principal USES of PVC in North America, in order of importance, are pipes, construction materials, consumer goods, packaging, and electrical products (such as wire and cable insulation).
MCP应符合NEMA 12日（北美应用）或IP - 54的外壳充分继电器的大小，人机界面，PLC机架等所需的洁净室系统的运作。
The MCP shall be a NEMA 12 (for North American applications) or IP-54 enclosure adequately sized for all of the relays, PLC rack, HMI, etc. required for the operation of the clean room system.
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