shielding constant [分化] 屏蔽常数
effective shielding constant 有效屏频常数
Penetrating-shielding constant 屏蔽
effective particle velocity shielding constant 有效屏频常数
As social constant development and progression, Metro Shielding Door Control Systems have obtained rapid development all over the world in recent years.
随着社会不断前进，屏蔽门系统在地铁的应用近几年在世界各地得到迅猛发展。
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