最终冰川会沿着裂缝断开形成一座新的冰山，这样的事情属于正常现象。
Eventually the ice will break off at the crack forming a new iceberg.
当一个分支断开时，正常情况下发往中心的请求被送到本地提供者，以便分支继续运行。
When a branch becomes disconnected, requests that normally go to the hub are sent to a local provider instead, so the branch continues operating.
直接启动、弹簧复位、正常闭合的邻近限制开关。可指定开关为断开或闭合。
Proximity limit switch, directly actuated, spring returned, normally closed. Switch can be specified as open or closed.
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