When the support arm is not in the socket, the gate element (126) provides a substantially flush surface with the front surface of the housing.

当支撑臂不在插座中时，闸门元件(126)提供与壳体的前表面基本齐平的表面。

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When the support arm is not in the socket, the gate element (126) provides a substantially flush surface with the front surface of the housing.

当支撑臂不在插座中时，闸门元件(126)提供与壳体的前表面基本齐平的表面。

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