短語詞組短語gear compound engagement 齒輪嚙合gear teeth engagement 輪齒嚙合Automatic gear wheel engagement 齒輪自動匹配gear tooth engagement 齒輪齒嚙合first -gear engagement 頭檔齒輪嚙合forced function gear engagement 強制嚙合齒輪helical gear engagement 交錯軸嚙合gear engagement principles 嚙合原理principle of gear engagement 齒輪嚙合原理 返回 gear engagement