前罩壳为聚炭酸醋，后罩壳为增强不饱和树酯。
The front housing is made of polycarbonate and the rear housing is made of reinforced unsaturated resins.
其目的是提供一种新型电动扳手，该电动扳手由前罩壳、工作头、减速器、电动机以及机壳组成。
The purpose is to provide a new electric spanner; the electric spanner comprises a front casing, a working head, a decelerator, a motor and an engine casing.
作业前，应检查并确认各部分导线连接良好，控制箱的外壳和接线板上的罩壳盖好。
Before the work, should inspect and confirm that various part of wire coupling is good, on control box's outer covering and tag board's cover housing cover is good.
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