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N a gland in certain invertebrates that secretes the components required for forming the shell of an egg 壳腺 [zoology]
Inspecting for the shell including the gland and union between the body and cap to see if there is leakage when reaches to stipulated time.
达到规定时间后，检查壳体(包括填料函及阀体与阀盖连接处)是否有渗漏。
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