短語詞組短語vertical overhead contact system 垂直吊線接觸網(wǎng);多邊形架空接觸網(wǎng)rtical overhead contact system 多邊形架空接觸網(wǎng)single overhead contact system 架空単線式電車線路polygonal overhead contact system 多邊形架空接觸網(wǎng)overhead contact system suspension 接觸懸掛overhead contact system works 接觸網(wǎng)工程技術rigid suspension overhead contact system 剛性懸掛接觸網(wǎng) 返回 overhead contact system