In a part extending along a line to cut in an object to be processed, laser light is oscillated in a pulsing fashion in an intermediate portion including an effective part, and is continuously oscillated in one end portion and the other end portion on {HEAD ~ both sides} of {TAIL ~ the intermediate portion} 
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In a part extending along a line to cut in an object to be processed , laser light is oscillated in a pulsing fashion in an intermediate portion including an effective part , and is continuously oscillated in one end portion and the other end portion on { HEAD ~ both sides } of { TAIL ~ the intermediate portion }
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