单词	long and steep downgrade
释义	long and steep downgrade 连续下坡
随便看	vibration-proof vibration-proof design vibration-proof equipment vibration proof foundation vibration-proof foundation vibration proofing material vibration proof installation vibration-proof installation vibration-proof lamp vibration proof material vibration-proof material vibration proof mechanism vibration-proof motor vibration proof mounting vibration-proof packaging vibration proof rubber vibration-proof rubber vibration proof structure vibration-proof structure vibration -proof structure vibration proof switch vibration-proof switch vibration proof swtich vibration-proof type installation vibration propagtion