The first step is a button trap which prevents small objects such as lint, fasteners, buttons, and coins from entering the solvent pump.
第一步是一个按钮，防止细小的物体，如林特，紧固件，按钮，和硬币进入溶剂泵。
They basically trap for null or empty values in the event that the user clicks the Search button without selecting valid options for both usage and configuration.
它将在用户没有为配方和用法选择有效的选项就单击Search按钮时跟踪null或空值。
This button will close Towers Trap.
这个按钮将关闭水塔的陷阱。
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