馬頭角屈臣氏汽水廠內有各種不同的生產機器。圖中後面較大的是消毒和凝結劑反應缸，而前方較小的兩個是砂濾器。Machine and equipment in A.S. Watson's Co. in Ma Tau Kok. The larger reaction tank at the back was for sterilization and coagulation, the smaller tanks at front were sand filters.