The laser light is delivered along a fibre optic cable to a laser head with a focal length of 120 mm.

激光光传递沿光纤电缆连接到激光头的和120毫米焦距。

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The laser light is delivered along a fibre optic cable to a laser head with a focal length of 120 mm.

激光光传递沿光纤电缆连接到激光头的和120毫米焦距。

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