The brake beam(connecting plate) is often broken, and the bolts for fixing the connecting plate are loosed due to the crane′s dynamic load when D series of crane beams are working in a steel plant.

某钢厂列吊车梁在工作中，由于吊车工作的动态作用，导致制动梁（连接板）经常发生断裂，固定连接板的螺栓松动。

youdao

Stem should be 400 series stainless steel, can not stem exposed to the butterfly plate fasteners.

阀杆应该是400系列不锈钢，不能将阀杆暴露在蝶板紧固件上。

youdao

DN and DN1 series marsh welders are widely used in the welding of low carbon steel strip, corrosion resistant plate, wires, silver contact and lots of non-ferrous metals.

DN 1系列点焊机广泛应用于工业生产中低碳钢板、不锈钢板、线材，银触头及大部分有色金属的焊接。

youdao