Optional double steps of pulleys.

可选的滑轮双步骤。

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This machine which is the nice machine for your testing department has the function with optional double-edged pressure, adjustable speed, adjustable route and settable number of stop bit.

该机设双头压力可配选、速度可调、行程可调、停止数可设等功能是贵公司测试部门的“良”机。

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Single beam, double beam light optional.

单束光、双束光自行可选。

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Additionally, the optional MB-D14 Multi Power Battery Pack extends the grip for comfort and can effectively double the battery capacity when using two batteries.

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