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Bituminous Instruments class：

• Petroleum Instruments 

• Geological Drilling Instrumen 

• Bituminous Instruments

• Rotational Viscometer 

• Coal Analysis Instruments 

• Low Temperature Instruments 

• Agricultural Instruments 

• Water Analysis instruments 

• Environmental Protection Instr 

• Medical Equipments 

• Chromatograph Instruments 

• Spectrum Instruments 

• Physical Instruments 

• Life Science Instruments 

• Color Management Instruments 

• Thermal Analysis Instruments 

• Packaging Material Instruments 

• Gas Analysis Instruments 

• optical Instruments 

• Food Instruments 