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| patch coating (The polyamide patch coating is a process where an elastic plastic material (Polyamide) is applied to a part of thread which creates a jamming action during the tightening of a nut. Сабу) | |||
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| patch coating (The polyamide patch coating is a process where an elastic plastic material (Polyamide) is applied to a part of thread which creates a jamming action during the tightening of a nut. Сабу) | |||