heavy-duty
/ˈhevɪˈdjuːtɪ/adjective
1- (of material or an article) designed to withstand the stresses of demanding use（材料, 物品）牢固耐用的：
heavy-duty rubber gloves.
牢固耐用的橡胶手套。
1.1
- informal intense, important, or abundant〈非正式〉强度大的; 重要的; 大量的：
she did some heavy-duty cleaning.
她干了些重体力清洁工作。