Technology named"theory of ball center"for ball screw manufacturing;
滚珠丝杠副制造中的“球心论”技术
Large scale preparation and characterization of NiO hollow microspheres
NiO空心微球的规模化制备与表征
NiS2 hollow microspheres were prepared by hydrothermal reaction between NiCl2·6H2O and Na2S2O3·5H2O at the low temperature of 150°C.
5H2O为原料,在150℃较低温度的水热条件下制备了NiS2空心微球,用XRD和SEM对产物进行了表征,NiS2粉体的X射线衍射的衍射峰均与标准衍射图一致(JCPDS:653 325,立方晶系,a=0。
Subsequently, the similar microstructured NiO hollow microspheres were obtained by calcining the above precursor at 400 ℃ for 2 h.
报道一种非常简单的制备NiO和Ni(OH)2空心微球的无模板水热法,即通过NiCl2与氨水在140℃水热反应12h,制备了Ni(OH)2纳米片自组装的空心微球,经400℃热处理2h得到了NiO空心微球。
Synthesis and photoluminescence of ZnO hollow spheres;
氧化锌空心球的制备及光致发光特征
Preparation of SiO_2,TiO_2,SnO_2 hollow spheres by colloidal carbon spheres;
利用胶体碳球为模板制备SiO_2、TiO_2、SnO_2空心球
K405 alloy hollow sphere foams with average aperture about 3mm and about 0.
采用空心球法制备平均孔径约3mm、壁厚约0。
Synthesis of silica hollow spheres with hierarchical morphology;
新型多级形貌的硅酸盐空心球的合成
Preparation and characterization of Fe_3O_4 submicrometer hollow spheres
四氧化三铁亚微空心球的制备及表征
Preparation and properties of titania hollow spheres by hydrothermal precipitation method
水热沉淀法制备TiO_2空心球及光催化性能
single-row self-aligning bearing
单列向心球面球轴承
The central portion of a cell aster exclusive of the rays.
星心球，中心球星体的中心部分，其射线除外
concentric spherical mesh grid electron gun
同心球面栅网电子枪
sion compensation angular ball bearing
热胀补偿向心球轴承
igning spherical rolling bearing
自动调心球面滚子轴承
He is good at medicine ball throwing.
他擅长投健身实心球。
Some rather loose bowling, ie in cricket
（板球中）漫不经心的投球
Penalty shoot-outs raise heart risks
“伤心”的点球大战
A tennis ball is hollow,but a base ball is solid.
网球是空心的，但棒球是实心的。
The defender centres the ball.
守卫队员将球传至中心。
I play golf for relaxation.
我打高尔夫球散散心。
World Geophysical Data Centres
世界地球物理数据中心
medicine ball
(锻练身体用的)实心皮球
cardiohepatid toxin
心肝毒素[如来自链球菌]
automatic centrifuge for blood cell washing
自动血球洗净离心机
multi-row radical thrust ball bearing
多列向心推力球轴承
single row angular contact ball bearing
单列向心推力球轴承
Japan's center for global communications site
日本全球通信中心站点