In manufacturing the positioning spring by etching, for example, in the embodiment, if the narrowed portions to be filled in the U shaped grooves of the slider are transferred on the film used in {TAIL ~ the etching} with the necessary accuracy, the positioning spring finished up has the narrowed portions with {HEAD ~ the precision} 
In manufacturing the positioning spring by etching , for example , in the embodiment , if the narrowed portions to be filled in the U shaped grooves of the slider are transferred on the film used in { TAIL ~ the etching } with the necessary accuracy , the positioning spring finished up has the narrowed portions with { HEAD ~ the precision }
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