Scientific apparatus and instruments, namely, areometer, hydrometer [, shearometer, thermometer not for medical purposes, laboratory equipment, namely, blender and mixer for use in testing samples of oil, sand, mud, cement, water and well-fluids, electronic ph-tester; weighing apparatus and instruments, namely, pair of balances, scales, mud balances ] ; measuring apparatus and instruments, namely, pressure transmitter, pressure indicator for use on diesel engines, steam engines, gas engines, ...