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常用NPT、PT、G、ZG、RC、M几种螺纹的区别
螺纹作为一种重要的机械连接元件,广泛应用于各个领域。不同种类的螺纹在结构、性能和应用上有很大的差异。本文将详细介绍NPT、PT、G、ZG、RC、M几种常用螺纹的区别,以帮助读者更好地理解和选择使用这些螺纹。 一、NPT螺纹 NPT螺纹,即美国国家管螺纹 ...
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Bắt khẩn cấp kẻ đánh tới tấp phụ nữ do va chạm giao thông ở quận 4 ...
Va chạm giao thông trên đường Khánh Hội, quận 4 (TP HCM), người đàn ông đã dừng xe đánh tới tấp một phụ nữ khiến dư luận bức xúc. Tối 10-12, Công an quận 4 (TP HCM) đã thực hiện lệnh bắt khẩn cấp với ...
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