轍叉焊補 的英文怎麼說
中文拼音 [zhéchāhànbǔ]
轍叉焊補
英文
frog welding and repairing-
Specification for arc welding repair of high manganese steel crossing
高錳鋼轍叉電弧焊補技術條件Maintenance on line to rail with high frequency inverter dc welding machine
高頻逆變焊機用於鋼軌及轍叉線上焊補與維護
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