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Collapsing tap
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Self-opening die head
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Self-opening die head
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Self-opening die head
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Automatic-releasing thread-cutting tool
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Chaser-holder for thread-cutting tools
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Taper-thread-cutting tool
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Chaser holder for die heads
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Thread cutting chaser
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Adjustable die-head
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Gauge for setting circular chasers
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Self-opening die-head
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Improvements in or relating to self-opening screwing die-heads
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Self-opening die-head
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Adjustable chaser-holding means
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Chaser-cutting mechanism
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Thread cutting chaser
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Self opening die head
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Self-opening die head
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Adjustable die head
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