外

wài outside; in addition; foreign; external

开

kāi to open; to start; to turn on; to boil; to write out (a prescription, check, invoice etc); to operate (a vehicle); carat (gold); abbr. for Kelvin, 開爾文|开尔文[Kai1 er3 wen2]; abbr. for 開本|开本[kai1 ben3], book format

窗户

chuāng hu window; CL:個|个[ge4],扇[shan4]

如何

rú hé how; what way; what

安装

ān zhuāng to install; to erect; to fix; to mount; installation

纱窗

shā chuāng screen window

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