C1966 Marry of the Wealthy Class 1893

Seeing that he was unwilling to give up, the foreman walked out of the room. After confirming that the owner had left, he then took out an apparatus mysteriously.

"Look at this table, this is the indoor air hazardous substances composition table, can test the air concentration of harmful substances. We do decorations know that formaldehyde, benzene, toluene, xylene