若返回值是复合型结构，那么元素包含一个或多个元素。
If the return value is a complex structure then the element contains one or more elements.
整体为复合型结构，外壳采用增安型结构，具有较强的防水、防尘能力，内装按钮、指示灯、电流表均为防爆元件。
Compound structure of safety - increased type, with functions of water - proofing, dust-proofing inside is arranged button, indicator, Ammeter of explosion-proof types.
因此，计算机审计要求审计人员必须具有复合型知识结构。
Therefore, the calculator audit requests auditing a personnel has to have a compound type knowledge structure.
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