inspection window
cửa quan sát
inspection window
cửa quan trắc
inspection window /xây dựng/
cửa quan trắc
inspection window /điện/
cửa đọc số
inspection window /điện/
cửa quan trắc
access hole, access opening, inspection manhole, inspection window, watch window
lỗ thăm
access opening, inspection window, manhole, peep-hole, sight hole, spyhole
lỗ nhìn
access door, inspection glass, inspection manhole, inspection panel, inspection port, inspection window, manhole, observation panel, peep hole, viewing window, viewport, watch window
cửa quan sát