HSK 7-9
光缆
guānglǎn名
optical cable
施工队正在铺设地下光缆。
Shī gōng duì zhèng zài pū shè dì xià guāng lǎn.
The construction crew is laying underground fiber-optic cable.
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Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.