Analyzes the reasons for times of erosion failure of the HP flash drum shell, and presents relative erosion control measures.
对高压闪蒸罐壳体多次冲刷损坏的原因进行初步分析，提出相应防治对策。
In 2006 a patent was filed for the first snare drum shell made from 100% crystal and in 2009 the subsequent patent was filed for the HMS mounting system needed to hold the crystal.
在2006年专利申请首次圈套是为安装所需的HMS举行晶系鼓提交由100%结晶并在2009年以后的专利作出的外壳。
Because of the much thick wall of large capacity boiler drum, the pressed and weld longitudinal seam is used to manufacture the drum shell ring.
由于大容量电站锅炉汽包的壁较厚，所以在汽包筒节制造时常采用压制成两个半圆瓦片再焊接而成的方法。
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