Rapid prototyping manufacturing in ice pattern and the key technology of substituting ice pattern for foundry pattern / wax pattern to produce ceramic mold / investment casting are introduced 介绍冰模快速成形技术及用冰模代替陶瓷型的铸型和熔模铸造的蜡模的技术关键。
Although it is soso , it repercented the period . seeing from the works , it was made after jiadao period , however , seeing from the lion model , it was made before tongguang period 雕工虽然一般，但是具时代特征。从龙的雕工来看此剑似为嘉道之后，但是从剑格狮子铸型来看似为同光之前。
The heat expansion coefficient of casting nylon materials is about 10 times larger than steel , so the internal dia shrinks caused by the expansion . it will influence the connection gap of the abrasive surface 铸型尼材料的热膨胀系数约比钢材大10倍左右，所以轴套在运行时由于摩擦热所造成的膨胀变形使内径缩小，影响摩擦面的配合间隙。
The effects of some parameters such as mould temperature and its uniformity , the mould rotation rate on the surface roughness and uniformity of thinkness in the process of duplex , alterable - rotation coating are studied 研究了用变转速二次布砂工艺覆砂时，铸型温度及其均匀性和铸型转速等工艺参数对覆砂层厚度均匀性和表面粗糙度的影响规律。
A special molding material ? expansion plaster used for this process could obtain 3 % expansion after being treated , which is beneficial to compensate dimensional contraction for plaster mold drying and alloy solidification 工艺中所用的特殊造型材料? ?膨胀石膏经处理后可得到3 %的膨胀量，足以抵消铸型因烘烤产生的尺寸缩小及合金凝固导致的收缩。
The reason of misrun and cold - lap formation in thin - walled aluminum casting is analyzed . increasing gas exhaust capacity in mould and filling velocity and controlling melt temperature are favorable methods for better effect 对薄壁铸铝件浇不足及冷隔的形成原因进行了分析，提出了增大铸型排气性、提高充型速度、控制出炉温度的解决措施，效果良好。
The deciduate casting mould agent casting mould drawing of patterns agent adopt high grade material to compound but is accomplished , have volatilizing speed is quick , efficient , spread brush repetition usage many times , do not glue a model 铸型脱模剂铸型脱模剂采用优质材料配制而成，具有挥发速度快、效率高，涂刷一次可重复使用多次，不粘模。
Methods origins , courses , branches , distribution and the anastomosis of the posterior antebrachial cutaneous nerve and its nutrient vessels were studied on 24 upper extremities and 5 fresh cadavers using gross anatomical method 方法使用24侧上肢标本和5具新鲜整尸标本，通过大体解剖、铸型和动脉造影等方法，研究前臂后皮神经及其营养血管的起始、走行、分支、分布及彼此间的吻合规律。
Methods : anatomic observation and blood vessel casting on 20 cadaveric specimens , as well as spinal cord angiography on 9 adults were taken to analyze medullary arteries and its anastomosis with the intercostal arteries or lumbar artery pertinent to thoracolumbar spinal surgery 方法： 20俱尸体运用解剖、血管铸型及9例成年人常规进行超选择性脊柱脊髓血管造影等方法，对脊柱脊髓血管应用解剖较系统地研究，了解脊柱脊髓血供及代偿通路。
