骨孔 meaning in Chinese

skeletal pore

2assemble the grille ceiling in advance on the floor ; 3mount each grille ceiling assembled on the suspended hook of the iron wire
3将预装好的每份格栅天花装在铁线吊钩上将跺钩穿进主骨孔内
3lift up the ceiling assembled thread the iron wire to the hole of main carrrier 4proceed to level adjustment after paving all ceiling tiling squares
3将预装好后的格栅天花吊起铁线穿在主骨孔内