名词
中文翻译：分级格栅
同义词：
['slotted grating', 'slotted slab例句：1. The echelle grating is used in the construction of bridges to prevent water from seeping through.（分级格栅用于桥梁建设中，防止水渗透。）2. The echelle grating was designed to improve the acoustic performance of the room.（分级格栅设计用来改善房间的声学性能。）']
例句：
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1. The echelle grating is used in the construction of bridges to prevent water from seeping through.
分级格栅用于桥梁建设中，防止水渗透。
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2. The echelle grating was designed to improve the acoustic performance of the room.
分级格栅设计用来改善房间的声学性能。
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3.The echelle grating was installed in the ceiling to create a more uniform sound field.
分级格栅安装在天花板上，以创造更均匀的声音场。