“军政府造四川铜币当制钱壹佰文”，本就是遗存稀少，更为难能可贵的是左图这枚铜币还是正反两面同一位置处逆转了四十五度。这一情形在之前发现的错版币中，十分罕见，这便是行话里的“逆背”了。如此整整逆转四十五度的可谓阴差阳错，自成一景。
"The military government made Sichuan copper coins as the money to make money". This is a rare relic. What is even more commendable is that the copper coin on the left is reversed 45 degrees in the same position on both sides. This situation is very rare among the wrong plates that have been discovered before. This is the "reverse" in the jargon. Such a complete reversal of forty-five degrees can be described as a yin and Yang fault, self-contained scene.
据市场上的投资者介绍，四川铜币是大众收藏品，收藏者有一定数量，前期国内各区域都有实力型买家介入四川铜币板块，在一定程度上控制了市场供货量，导致其价格快速走高。同时，四川银币的价值也在同步上升。从藏家和市民的接受程度看，预计后期四川银币的价格还将继续上涨。俗话说：“物以稀为贵”，由于该钱币作为特殊历史时期、地方政权的特殊货币，具有不可替代的文物价值等特点，从收藏与投资角度来说乃非常珍贵。
According to investors in the market, Sichuan copper coins are mass collectibles, and collectors have a certain number. In the previous period, all regions in China had strong buyers involved in the Sichuan copper coins plate, which to some extent controlled the market supply volume and led to its price. Fast rise. At the same time, the value of Sichuan silver coins is also rising. Judging from the acceptance of Tibetans and citizens, the price of Sichuan silver coins is expected to continue to rise in the later period. As the saying goes: "Things are rare and precious." Because the coin is a special currency of special historical periods and local governments, it has irreplaceable cultural relics and other characteristics. It is very precious from the perspective of collection and investment.
鉲元素原矿石
名称：鉲元素原矿石
年代：天然
规格：重13.7g
介绍：自然界中的鉲少之又少，而要合成的话只有在特定几个地方才行，鉲是一种银白色的锕系金属，处於纯金属态时，鉲是具延展性的，可以用刀片轻易切开。在真空状态下的鉲金属到了300C以上时便会气化。
Introduction: there are few thorium in nature, and only a few places to synthesize, thorium is a silver-white actinide metal, in the pure metal state, thorium is ductile, can be easily cut with a blade. When the thorium metal in vacuum is above 300C, it will vaporize.Idaho National Laboratory produced a significant amount of cesium for the first time by radiating plutonium targets. The results were released in 1954. The high spontaneous fission rate of yttrium-252 can be observed in the resulting sample. In 1958, scientists conducted experiments for the first time.
爱达荷国家实验室通过对钸目标体进行辐射，首次产生了重量可观的鉲元素，并於1954年发布了研究结果。产生的样本中能够观察到鉲-252的高自发裂变率。1958年，科学家首次对浓缩鉲进行了实验。
There is a very small amount of helium on the earth, which is mainly found in uranium mines with high uranium content. After uranium captures neutrons, the ore containing helium is beta decayed to form helium. Tantalum can also be found near facilities that use tantalum for prospecting or medical treatment. is not easily soluble in water, but it sticks to the soil, so the concentration of earthworms in the soil can be 500 times that of the water surrounding the clay particles.
地球上有着极少量的锎，主要出现在含铀量很高的铀矿中。铀在捕获中子之后，含锎矿石进行β衰变，从而形成锎。在使用锎进行探矿或医学治疗的设施附近也可以发现锎。锎不易溶于水，但会黏附在泥土上，所以泥土中锎的浓度可以比泥土粒子周围的水高出500倍。能够利用的锎的数量非常少，使其应用受到了限制，可是，它作为裂解碎片源，被用于核研究。该元素是世界上最昂贵的元素，1克价值1000万-2000万美元， 是金子的50万倍，可用作高通量的中子源。 在核医学领域可用来治疗恶性肿瘤。由于锎-252中子源可以做得很小很细，这是其它中子源所做不到的，所以把中子源经过软管送到人体腔内器官肿瘤部位，或者植入到人体的肿瘤组织内进行治疗。特别是对子宫癌、口腔癌、直肠癌、食道癌、胃癌、鼻腔癌等，锎-252中子治疗都有相当好的疗效。
The very small number of cockroaches that can be used limits its application, but it is used as a source of cracking debris for nuclear research. This element is the most expensive element in the world. One gram is worth 10 million to 20 million U.S. dollars, which is 500,000 times that of gold and can be used as a high-throughput neutron source. It can be used in the field of nuclear medicine to treat malignant tumors. Since the -252 neutron source can be made very small and fine, which is not possible for other neutron sources, the neutron source is sent through the hose to the tumor site of the human cavity organ, or implanted in the human body's tumor tissue for treatment. In particular, for uterine cancer, oral cancer, rectal cancer, esophageal cancer, stomach cancer, nasal cancer, etc., the neutron-252 neutron therapy has a very good effect.
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