（《别录》下品）
【释名】时珍曰∶黄帝始作弩。刘熙《释名》云∶弩，怒也，有怒势也。
其柄曰臂，似人臂也。钩弦者曰牙，似人牙也。牙外曰郭。下曰悬刀。合名之曰机。
颂曰∶药用铜弩牙，以其有锡也。
【气味】平，微毒。
【主治】妇人难产，血闭，月水不通，阴阳隔塞（《别录》）。
【发明】弘景曰∶铜弩牙治诸病，烧赤纳酒中饮汁，古者弥胜。
刘完素曰∶弩牙速产，以机发而不括，因其用而为使也。
【附方】旧一。误吞珠钱，哽在咽者∶铜弩牙烧赤，纳水中，冷冻饮料汁，立愈。（《圣惠
方》）
（《纲目》）
【气味】有毒。
时珍曰∶铜器盛饮食茶酒，经夜有毒。煎汤饮，损人声。
藏器曰∶铜器上汗有毒，令人发恶疮内疽。
【主治】霍乱转筋，肾堂及脐下疰痛，并炙器隔衣熨其脐腹肾堂（大明）。古铜器畜之，
辟邪祟（时珍）。
【发明】时珍曰∶赵希鹄《洞天录》云∶山精水魅多历年代，故能为邪祟。三代钟鼎彝
器，历年又过之，所以能辟祟也。
铜钴 （一作钴KT ，熨斗也）
【主治】折伤接骨，捣末研飞，和少酒服，不过二方
寸匕。又盛灰火，熨脐腹冷痛（时珍）。
铜秤锤
【主治】产难横生，烧赤淬酒服（大明）。
铜匙柄
【主治】风眼赤烂，及风热赤眼翳膜，烧热烙之，频用妙（时珍）。
(Recorded in the Lower Category of *Bie Lu*)
[Names] Li Shizhen stated: The crossbow was first invented by the Yellow Emperor. Liu Xi, in his work *Shi Ming*, explained: "Nu" (crossbow) derives from "Nu" (anger/fury), indicating its rapid and forceful momentum. The handle is called the "Bi" (arm), resembling a human arm. The hook that draws the string is called the "Ya" (tooth), resembling human teeth. The part outside the tooth is called the "Guo" (frame). The lower part is called the "Xuandao" (hanging knife). Collectively, these parts are named the "Ji" (mechanism). Su Song stated: Medicinal copper crossbow teeth are used because they contain tin.
[Properties and Flavor] Neutral in nature, slightly toxic.
[Indications] Dystocia in women, blood stasis with amenorrhea, obstruction of menstruation, and blockage between Yin and Yang qi mechanisms (*Bie Lu*).
[Elucidation] Tao Hongjing stated: Copper crossbow teeth can treat various ailments; burning them red and immersing them in wine to drink the liquid was considered a superior method by the ancients. Liu Wansu stated: Crossbow teeth facilitate rapid childbirth because the mechanism releases without restraint, utilizing its inherent function for therapeutic effect.
[Prescriptions] One old prescription. For swallowing pearl coins or money causing choking in the throat: Burn a copper crossbow tooth until red, immerse it in water, and drink the cooled liquid for immediate relief (*Taiping Shenghui Fang*).
(The following content is from *Bencao Gangmu*)
[Properties and Flavor] Toxic.
Li Shizhen stated: Storing food, drinks, tea, or wine in copper vessels overnight generates toxicity. Decocting and drinking such water damages the voice.
Meng Shen stated: Sweat residues on copper vessels are toxic and can cause severe sores and internal abscesses.
[Indications] Muscle spasms (Zhuanjin) due to Huoluan (cholera-like syndrome), and Zhitong (wandering pain) in the kidney region and below the umbilicus; apply heat using a hot copper vessel through clothing to moxa-iron the abdomen and kidney area (*Rihua Zi Bencao*). Keeping ancient bronze vessels can ward off evil influences (Li Shizhen).
[Elucidation] Li Shizhen stated: Zhao Xigu, in *Dongtian Lu*, noted that mountain spirits and water demons often exist for long periods, thus capable of causing harm. Bronze vessels like bells, tripods, and ritual vessels from the Xia, Shang, and Zhou dynasties have existed even longer, hence their ability to dispel evil influences.
Copper Iron (also written as "Gu", meaning ironing tool)
[Indications] Fractures from trauma: Crush into powder, refine by flying (levigation), mix with a small amount of wine, and take orally. Do not exceed one Fangcunbi (a square-inch measure). Alternatively, fill with hot ashes and use to iron cold pain in the abdomen and umbilical region (Li Shizhen).
Copper Scale Weight
[Indications] Breech presentation or difficult labor: Heat until red, quench in wine, and drink the wine (*Rihua Zi Bencao*).
Copper Spoon Handle
[Indications] Wind-eye redness and ulceration, as well as wind-heat induced pterygium or corneal opacity in red eyes: Heat until red and cauterize the affected area. Frequent application yields excellent results (Li Shizhen).