Breakers that weigh more than 10 kilograms and air compressors that can supply compressed air at 500 kilopascals or above must be fitted with noise emission labels when being used for construction work 重量超过10千克的手提撞击式破碎机及压力不少于500千帕斯卡的空气压缩机，必须符合法定的噪音标准，并须贴上噪音标签，方可使用于建筑工程上。
