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The paper analyses the forming causes of blank crack and points out that higher core sand strength, bottom-casting single-layer runner and solid structure of sand core are main factors of affecting the blank casting quality.

分析了大斗毛坯产生裂纹的原因，并指出芯砂强度高、底注单层浇道、砂芯为实心结构等是影响大斗毛坯铸造质量的主要因素。

With the continuous development of the high compacted molding methods and technique, the quality of casting especially their surface quality and size accuracy have been increased significantly, and the rate of waste product was reduced greatly. The degree of ramming of sand mold was improved highly, but the sizes of cavity were changed by the springback of sand mold at the same time, and then it causes the variety of the sizes of casting.

随着高紧实度造型技术和方法的不断发展，铸件的质量尤其是表面质量和尺寸有了很大的提高，大大降低了废品率，但是在砂型紧实度提高的同时，由此产生的型砂回弹改变了行腔尺寸，引起铸件尺寸的变化，成了制约铸件精度和质量的重要因素。

The chill block hanged sand and the riser were used to optimize the original casting process. Finally the shrinkage of the casting was eliminated.

采用挂砂外冷铁配合冒口使用对原方案进行了优化，最终消除了铸件中的缩孔缺陷。

The Mg-Si-Sn series magnesium alloy casting member which is melted according to ingredient formulation is placed into box type resistance furnace with protective atmosphere for preserving heat, in which the range of temperature is from 490 DEG C to 550 DEG C and the time of heat preservation is from 1 hours to 4 hours; and then the casting member is quickly taken out and put into water for quenching.

将按成分配比熔炼的Mg-Si-Sn系镁合金铸件置于带有保护气氛的箱式电阻炉中保温，温度范围为490℃～550℃，保温时间为1～4小时，然后快速取出放入水中进行淬火。

There is dry sand-casting, EPC-casting, resin sand EPC technology.

主要有干砂实型铸造、负压实型铸造、树脂砂实型铸造等技术。

Results: No significant differences in clinical effect between dental casting pure titanium and casting Co-Cr alloy used for complete denture or removable partial denture.

结果：采用的齿科铸造用纯钛或钴铬合金制作总义齿基托或者可摘局部义齿支架，两种材料在安全性、强度和适合性方面无显著差异。

Quick casting generated by combining RP technology with casting technology is one of major research fields of RM.

RP技术与铸造工艺结合产生的快速铸造是 RM的主要研究领域之一。

The lubricants of casting mold used in green sand transfer coating were investigated under impact pressure casting.

在气冲造型条件下对粘土砂转移涂料的脱模剂进行了研究。

Casting a quality fly rod is a thing of joy, sometimes I can become so lost in the rhythym of fly casting I actually forget about the fish.

铸件质量飞棒一件欢乐有时我可以变得这么迷失在rhythym铸造其实我忘了飞的鱼。

In fact, the main practical difference between fly fishing and casting is that in casting, you are using the weight of the lure to "throw" it out.

其实，主要差异实际在于，飞渔铸造铸造你是用重量为诱饵&扔&出来。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。