研究了影响冻结井预制弧板井壁变形特性的接头刚度。
Studied the joint rigidity which affects deformation characteristics of prefabricated arc board of freezing well.
导弧板将电弧向熄弧栅引导，其靠近动触头一端具有直流引弧角。
A guide arc plate leads the electric arc to the arc splitter and the end close to the active contact is provided with a DC guide arc Angle.
钢铠阻燃型硬质聚氨脂泡沫塑料弧板是由黑龙江省商业厅设计的一种新型保温材料。
Flame-retarding rigid polyurethane foam arc plate armoured with steel is a new type thermal insulation material developed by the Commercial Department of Heilongjiang Province.
应用推荐