drain hole短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 排水孔,排出孔 This paper will mainly discuss the application and improvement of equal pressure principle, dustproof adhesive tape, and drain hole of European aluminum composite wood doors and windows. 对此，本文主要从欧式铝木复合门窗等压原理及防尘胶条、排水孔的应用及改进等方面进行分析与探讨。 dictall