annular lamp cover.
环形吊灯上盖
narrow annular gap.
环形狭窄通道
annular bypass port.
环空旁通孔
annular laser beams.
环形激光束
annular spouted bed.
环形喷动床
annular slide window.
环形滑动窗口
Gerlach annular tendon
热利耶环状腱, 鼓膜纤维软骨环
annular pipe flowmeter.
环形管流量计
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