石针

随着针灸的发展，简易的砭石被石针或瓷针所代替。

As acupuncture developed , the simple ' bian stones ' were replaced by stone and pottery needles .

地球吸引物体就好像磁铁石吸引针一样。

The earth pull thing to it just as a magnet pull needle .

黑液的资源化处理及累托石、针铁矿的吸附解吸行为研究

Resource-transfer of Paper-making Black Liquor and Study of Absorption and Desorption of Rectorite and Goethite

但用做后加矿的进口三水铝石矿通常含有针铁矿或铝针铁矿，针铁矿含量过高会导致赤泥沉降、压缩性能变坏，溢流浮游物含量过高。

But the imported gibbsite bauxite used as sweetening ore usually contains goethite and alumogoethite , which can cause the settling properties of red mud to go bad , the content of overflow suspensions to go too high .

研究表明，红土风化壳剖面自下而上，伊利石、高岭石减少，三水铝石、针铁矿、赤铁矿增多。

The study shows that from the bottom to the top of laterite weathering crust profile , illite and kaolin decrease , gibbsite , goethite and hematite increase .