不含铁的

Inert gas welding is the preferred method of joining several ferrous and nonferrous alloys.

惰性气体焊接是连接几种含铁和不含铁的合金的首选方法。〖产品安全

In this paper, we studied M. meretrix ferritin, cathepsin B and caspase genes, which are involved in clam larval shell formation, nutrition, metabolism and apoptosis, respectively. We have cloned the three genes, investigated the temporal and spatial expression profile both at gene and protein level in trochophore (L1), D-veliger (L2), pediveliger (L3) and postlarvae (L4). The potential roles of these proteins were analyzed with specific inhibitors during larval development. Firstly, embryos were found developed into trochophore-like larvae with no shell if cultured at gastrula stage in artificial seawater without iron. Shell-like structures were formed only in the presence of iron. The larvae which had been transferred at L1 stage into ASW developed normal shell. This indicated that iron and iron associated protein are important for larval shell formation. The EST sequence which is homologous with ferritin, which is a principal iron metabolic protein, was selected from the M. meretrix cDNA library. The full-length of ferritin subunit cDNA was cloned by RACE. The results of real-time PCR revealed that the MmeFer mRNA expression changed before and after the larval shell formation.

本论文以文蛤幼虫为研究对象，分别对文蛤幼虫发育过程中贝壳形成相关的铁蛋白、营养及变态相关的组织蛋白酶B及变态过程中细胞凋亡相关的caspase三个基因进行了克隆，分析了基因及编码蛋白在担轮幼虫期(L1)、D形幼虫期(L2)、壳顶幼虫期(L3)和稚贝期(L4)的时空表达特征，解析了其可能的功能，并研究了相应酶类的特异性抑制剂作用对幼虫发育过程的影响，进行了目标蛋白的功能验证，详述如下：研究结果显示，在文蛤胚胎发育到原肠胚时放入不含铁离子的人工海水中培养，发育成无壳的畸形，随着人工海水中铁离子添加浓度的升高，幼虫长出壳状组织接近正常状态；而发育到L1期幼虫放入不含铁离子的人工海水中培养却可以发育出正常的壳，推测铁和铁代谢相关蛋白在幼虫贝壳初始形成有重要的作用。

The scrap metal are steel, ferreous and non ferreous. the grade of the steel I dont have the exact classification. If I have to class them, then we would have more time consuming and it will cost more money to seperate them.

钢的、含铁或不含铁的废金属，我们没有精确的划分等级标准，如果我们去划分它们，我们将花费大量的时间，并且会浪费很多钱来区分他们。

The scrap metal are steel, ferreous and non ferreous.

钢的边角废料，含铁的不含铁的。

The effect of impurity H2SO4 in the simulating wet-process phosphoric acid on the rheological behavior of the ammoniated slurry was studied.

用化学试剂配制不含铁的模拟湿法磷酸，在其铝，镁，氟杂质浓度固定的条件下，改变硫酸杂质的浓度，在50 ℃下测定其氨化料浆的流变曲线。

This research is a new low cost method of producing abrasive grit. It is to put the iron ore concentrate, coal powder, hydrated limed and addition agent together to make coal mixed pellet in prior which is rapidly auto-reduced in high temperature and kept about 10min above 1350℃, and then furnace cooled. The 2CaO·SiO2 of slag phase change、volume increase and natural bloom in reduction process. Finally we obtain no-slag abrasive grit through screen separation , in which the iron yield can be above 90%,the sulfur content can be below 0.05% and carbon content is lower than 4.0%.

本研究是一种全新的低成本生产铁粒的方法，它是将铁精粉、煤粉、消石灰和添加剂预先制成球团，在高温下迅速加热还原，在1350℃以上保温10分钟后随炉冷却，渣相中2CaO·SiO2在冷却过程中发生相变，体积膨胀而自然粉化，通过筛分便可以得到不含炉渣的铁颗粒，铁的收得率在90%以上、S≤0.05%、C在4.0%左右。

The government provided him with a nearly iron-free chinese structure close to the observatory.

政府提供给他一座几乎不含铁的中式房屋关闭天文台？

These findings show that, contrary to popular belief, tannins are not responsible for the difficulty in pairing red wines with seafood. Instead, monitoring the iron content of wine is the key (unfortunately, there is as yet no way to guess in advance from grape variety or soil which red wines will be iron-free).

这些发现表明，同我们通常的认识相反，单宁酸不是红酒和海鲜搭配困难的原因，而监视酒中铁的含量才是关键（不幸的是，至今还没有办法可以提前根据葡萄种类或者土壤预测哪种红酒是不含铁的）。

Aluminum Bronze A1 GB:HSCuAl AWS A5.7:ERCuAl-A1 DIN 1733:SG-CuAl8 Description: Aluminum Bronze A1 is an iron-free copper-aluminum based bronze.

铝青铜焊丝国家标准：HSCuAl 美国焊接协会标准：ERCuAl-A1 德国标准：SG-CuAl8 产品说明：铝青铜A1是一种不含铁的铜-铝基青铜。

Clay that does not contain any iron; used in making pottery or for modeling.

不含铁的粘土，用于制陶或建模。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷