1.
These plastic balls don't blow up easily
这些塑料球不容易打气。
2.
(trade mark) a hollow plastic ball with cutouts.
（商标）有剪切块的中空的塑料球。
3.
Test for hardness of plastics by the ball indentation
GB/T3398-1982塑料球压痕硬度试验方法
4.
The Gyricon sheets have thousands of plastic balls suspended in oil.
Gyricon片有成千上万个悬浮在油中的塑料球。
5.
manually operated thermoplastic ball valve
热塑性塑料手动式球阀
6.
The Research of Precision Injection Molding of Optical Plastic Lens;
塑料非球面光学镜片注塑成型的工艺研究
7.
protective glide of plastics for placing under furniture
保护性塑料滑球,安装在家具下
8.
The scientists say water drops form small balls on the new plastic,
科学家说，水滴在新型塑料上形成小球，
9.
A MOLDING TECHNOLOGY FOR PLASTIC OPTICAL ASPHERICAL LENS
一种塑料光学非球面镜片的成型技术
10.
Standard methods of testing for impact resistance of plats and pats made from engineering plastic rigid plastics by a ball(falling ball)
GB/T14485-1993工程塑料硬质塑料板材及塑料件耐冲击性能试验方法落球法
11.
Plastics are classified into two types-thermoplastics and thermosets.
塑料分成两类:热塑塑料和热固塑料。
12.
Numerical Simulation and Optimization in Aspheric Optical Plastic Lens Injection Molding;
塑料非球面光学镜片注塑成型数值模拟与工艺优化
13.
You tee off on the plastic turf whacking your ball against the screen.
你在塑料草地上发球，对着屏幕用力猛击。
14.
The Simulation and Optimization of Aspheric Optical Plastic Lens Injection Molding;
非球面塑料光学镜片成型工艺仿真与优化
15.
Explore ration of 2-step Injection Shaping Method of Aspherical Plastic Lenses;
非球面塑料透镜两步注射成型法的探索
16.
Explore Shaping Method of High Accuracy Aspherical Optics Plastic Lenses;
高精度非球面光学塑料透镜成型法的探索
17.
The Elasto-plastic Solution to the Problem of Expansion Lining in Spherical Cavity with Tresca Materials
Tresca材料球形腔体扩张衬砌问题的弹塑性解
18.
Application of Falling Ball Method in Testing the Impact Property of Thermoset Molding Composite
落球法测热固性模塑料冲击性能的研究