Strong magnetic needle super large compass high school teaching instrument Oster experimental equipment large compass current magnetic field

Specimen Poison Bottle Insecticidal Bottle J8251 Biological Experiment Teaching Instrument Diameter 8.4cm High 12cm

Three-line five-line light source three-line light source semiconductor laser parallel light source physical optics experimental teaching instrument

Hand AC/DC generator J2417 school physical and electrical experimental equipment teaching instrument for junior and senior high schools

light pressure windmill crooks radiometer light pressure rotating lamp heat radiometer sun windmill thermal energy sphere physics

Three-color light source physical optics experiment teaching instrument

Calorimeter Junior High School Physics Teaching Instrument J22201 Specific Heat Experimental Equipment for Electrothermal Equivalent Objects Teaching Aids

Gas work internal energy reduction demonstrator thermistor thermometer barometer thermodynamic law experiment

Double-track flat throwing motion tester electromagnet photoelectric door Senior high school physical mechanics teaching instrument chute guide rail

Electronic induction coil junior high school physics electricity electrostatic teaching instrument experimental equipment high voltage tip discharge electric spark

Submarine Floating and Sinking Principle Demonstrator Mechanical Buoyancy Archimedes' Principle Experiment New Curriculum Standard Physics Teaching Instrument

Demonstration of the original secondary coil 24009 physics experiment equipment teaching equipment demonstration equipment electromagnetic induction solenoid

Micro piezometer with base liquid internal pressure tester probe U-shaped glass tube transparent liquid container

Plane Mirror Imaging Experimenter Demonstrator Large Half Mirror Coated Glass Light Propagation Reflection Physics

Separating funnel dropping funnel spherical 60ml chemical glass instrument laboratory consumables experimental supplies

Pulley set gear set axle lever ruler and bracket scientific strength and mechanical equipment suit physics teaching experiment

Metal galvanized weight tweezers weight special tweezers plastic tweezers Tianping weighing weight tweezers tray balance accessories

100 pieces of absorbent paper/box 2.5 * 8cm cleaning and dust removal experiment consumables for microscope teaching instrument

Electric Bell vertical electric bell electric bell model electromagnet principle electric bell principle electromagnetism teaching instrument demonstration model

Lever ruler aluminum alloy wood plastic lever balance principle test physical mechanics experimental teaching instrument

Porcelain dropping plate 6-hole 6-hole 6-hole reaction plate physical and chemical porcelain chemical experiment equipment White reaction plate

Three-color light source three-primary color synthesis experiment device physical optics three-color light demonstrator teaching instrument

Gas Law Demonstrator Gaylussac's Law Boyle Boyle Mallot Charlie Ideal Gas State

Polarization demonstrator of polarizer light physical optics teaching instrument color polarizer experiment polarizer

Stainless steel rubber head insect needle specimen needle with high hardness, sharp tip and good elasticity, specimen making teaching instrument

Centrifugal sedimentation device hand-operated J02071 physical experiment equipment mechanics junior high school chemistry biology teaching instrument

Electric solenoid experimental device demonstrator right hand spiral rule magnetic field demonstration physics teaching instrument New Curriculum Standard

Large physical electromagnetism experiment teaching instrument material

Curve motion speed direction demonstrator high school physics new curriculum standard experimental instrument teaching instrument

Electrolyte solution conductive demonstrator J2639 diode bulb display Middle School electrochemical graphite electrode

Maxwell rolling pendulum gravity potential energy kinetic energy conversion demonstration equipment Middle School physics experiment

New ship lock model J80156 water level connector secondary ship lock construction principle demonstration physics teaching instrument

30605000202 Crucible clamp nickel plating 304 stainless steel high temperature resistant porcelain crucible clamp muffle furnace gray dish fixture

Demonstration of electromagnetic relay new curriculum standard 30307402301 electromagnet principle high school physics electromagnetism teaching

Electrostatic experiment box physical teaching instrument 23048 electrostatic dust removal flocking shielding Lightning Rod electric field line force

30307102301 pressure and pressure demonstrator Teaching Instrument Physical Mechanics Teaching Aids new curriculum standard