Overflowprotection device can safely and efficiently prevent the liquid from entering into the pump.
溢流保护装置能有效的阻止液体进入泵内；
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Just note that writing deeply recursive functions on the SPE is problematic because there is no stack overflowprotection on the SPE, and the local store is small to begin with.
The features of the BEPCII linac vacuum system are described, with the remote monitoring system used in the process of ion pump power starting to normal operation and overflowprotection based on PLC.