短语词组短語hot -dip zinc-iron alloy coating 熱鍍鋅鉄郃金鍍層Hot -dip galvanized zinc coating thickness 熱浸鋅鋅層厚度hot dip -coating 熱浸漬法hot dip re -al coating 熱浸鍍稀土鋁 返回 hot-dip coating