COIL INSERT
PROBLEM TO BE SOLVED: To provide a coil insert easily insertable into a tap hole in a base material, without using a special exclusive tool.SOLUTION: This coil insert 1 includes a coil body 10 of helically winding a wire 11, and a handle member 20 for filling a hollow space 12 formed inside the coil...
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Format: | Patent |
Sprache: | eng |
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