The gland plate comprises a core layer and a top and a bottom sandwiching layers, the composition of which is selected for the desired purpose;
密封板包括芯部层和顶 部和底部夹置层，其组分根据所需目的而选择；
OPC Standard is selected as upper layer interface in contrast with EPA Specification as bottom layer interface in EPA Data Server based on OPC.
基于OPC标准的EPA数据服务器选择OPC标准作为上层接口，选择EPA规范作为底层接口。
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