梁体纵向缩短
beams longitudinal shortening
卷缩收缩法
crimp-contracting process
150 kA纵向双列预焙阳极铝电解系列
the double longitudinal series of 150 kA pre-baked anode electrolysis cell
150kA纵向双列预焙铝电解槽
150kA pre-baked anode cell arranged in double rows and end by end
比例制动式纵向零序电压保护
longitudinal zero-sequence voltage protection restrained with the third harmonic voltage