检查主接地排和接地排是否可靠连接；
Check the connection of the main earthing bar to the earthing rail of the Powerbloc.
想象你是一个客户端，很显然，需要双向可靠连接。
Imagine you are a client and it is clear that there will be a two-way reliable connection.
它的主要责任是确保端至端之间的可靠连接。
Its chief responsibility is to ensure reliable end-to-end connectivity.
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