American black walnut is 1986, I imported from the United States, the United States in 1989 to set up black walnut base. Main business Juglans nigra. American black walnut is the world's best recognized one of the hard-width wood species, the wood structure it closely, mechanical strength Higher, texture, color aesthetic, and easy processing, the plywood is fine wood, black He Taomu furniture, carving process, such as architectural decoration.
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The results showed that the if steel has better deep drawability, higher mechanical and texture strength and elongation if the hot rolling temperature was low with big reduction in ferrite region.
结果表明，较低的铁素体轧制温度和较高的铁素体区压下量时，IF钢具有更高的深冲性能、相对较高的强度、延伸率以及织构强度。
Iron-manganese ore composite pellets have higher mechanical strength and better metallurgical properties than those of conventional pellets.
铁锰复合球团矿与原铁矿球团相比，具有较高的机械强度和良好的冶金性能。
In physical and mechanical indexes, the basic density, air-dried density, compression strength parallel to grain, MOR, MOE and toughness of mature wood are higher than that of juvenile wood.
在物理力学性质指标中成熟材的基本密度、气干密度、顺纹抗压强度、抗弯强度、抗弯弹性模量及冲击韧性高于幼龄材；
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