A particular device of location and compaction for welding by one side in shape by both sides was designed according to the enterprises requirement in steel platesbutt joint.
针对某企业需求的平板对接，为解决大型钢板焊接不易翻转的难题，设计了一种单面焊双面成形定位压紧小车。
2
The parting surfaces of a mould are those portion of both mould plates, adjacent to the impressions, which butt together to form a seal and prevent the loss of plastic material from the impression.
模具的分型面是两模板接近型腔的那些部分，它们对接一起形成油封并且避免型腔里塑性材料的损失。
3
The round plates with arc shaped butt-welded joints were used for stopping sone tube holes which were moved away to another proper positions in the pipes.