Since vacuum technology applied in heat treatment, a new heat treatment processes exists vacuum heat treatment, which has a distinct advantage in all respects in comparison with classical process.
在真空技术应用于热处理行业之后，产生了一种新型的热处理工艺—真空热处理。与传统工艺相比，真空热处理在很多方面都有着明显的优势。
A new class of non-class of non-classical state of the radiation field is constructed, which is called superposed state of two-mode vacuum state and two-mode coherent state.
构造了辐射场的一类新的非经典态，即双模真空态与相干态的叠加态。
All glass vacuum filter holders: Classical design, they are used conveniently.
溶剂过滤器：经典设计，使用便捷。
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