The phonetics is the material & external shell of language.
语音是语言的物质外壳。
Can also be used to external lighting and signal device and vehicle lamps shell protection.
也可用于外部照明和信号装置及汽车灯具外壳防护。
Can also be used to external lighting and signal device and vehicle lamps shell protection.
也可用于外部照明和信号装置及汽车灯具外壳防护。
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