Drill holes on the top of the doorway according to the hole position on the guiding track. Fill in plastic plug when necessary.
根据导轨孔位在门洞上端钻孔，必要时打入胶塞。
Drill holes on the top of the doorway according to the hole position on the guiding track. Fill in plastic plug when necessary.
根据导轨孔位在门洞上端钻孔，必要时打入胶塞。
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