Main Purpose: spark plug, electronic substrate, electric vacuum tubes, ceramic boby, etc.
主要用途：火花塞、电子基片、电真空管、电子陶瓷基体、高级耐火材料等。
The brief introduction concerns the chemical treatment process developed by Moskvosk steel tube Works, Russia for carbon steel tubes drawn with short-plug or non-plug process.
简要介绍了俄罗斯莫斯科钢管厂开发的短顶头和无顶头拔制碳素钢管的化学处理工艺。
Secondly, if pollen tubes entered into stigma, growth was retarded with callose plug deposition, then they stopped to grow because of inhibition.
即使父本花粉管进入母本柱头，因生长缓慢，沉积胼胝质，在花柱中受抑制而停止生长。
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