研究了塑料管式安全鞭炮的制备原理和制备工艺，分析了APC引燃剂的主要性能。
The preparation principle and techniques of plastics-tubing safety fireworks are introduced, and the main characteristics of APC is tested.
塑料管道系统。玻璃纤维增强式热固性塑料元件。检验带有弹性密封件的刚性锁定管座套筒接头设计的试验方法。
Plastics piping systems. glass - reinforced thermosetting plastics components. test methods to prove the design of rigid locked socket - and - spigot joints with elastomeric seals.
这是另一种离奇的思维式圣诞树，它由颜色各异的塑料管组成。
Here's another weird conceptual Christmas tree made out of different colours of plastic tubing.
本文通过实验，研究了塑料管溴化锂吸收式制冷机中聚四氟乙烯换热器的传热性能及制冷机组性能。
Study on the coefficient of PTFE heat exchangers and refrigerator, using the theory calculation and experimental methods.
本文通过实验，研究了塑料管溴化锂吸收式制冷机中聚四氟乙烯换热器的传热性能及制冷机组性能。
Study on the coefficient of PTFE heat exchangers and refrigerator, using the theory calculation and experimental methods.
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