本规范涵盖无菌、一次性、单独包装的双尖针头，其安全连接到用于牙科、区域和麻醉注射的筒式注射器上。

This specification covers sterile, single-use, individually-packaged, double-pointed needles with a means of secure attachment to cartridge-type syringes used for dental, regional, anesthetic injections.