Absorbent cotton/cotton ball 500g large bag absorbent cotton roll tattoo embroidery cotton sheet can be used for cotton ball Laboratory

Metal stainless steel aluminum alloy lever ruler 50cm with scale lever ruler mechanical balance metal hook code set

Device for the determination of oxygen content in the air Determination of oxygen volume content Set Chemical laboratory equipment Teaching AIDS

Rubber mardeburg hemisphere experiment vacuum atmospheric pressure diameter 12cm mardebao hemisphere J2115 teaching instrument

Ceramic evaporation dish 60mm coarse salt purification chemical experiment equipment evaporation pot teaching instrument

Strut fixed pulley and table side clamp group 21027 type physical mechanics experiment junior and senior high school physics teaching instrument

Paper tray speaker 22213 type physical acoustic experiment equipment junior and senior high school physics teaching instrument

Three-color synthesis demonstrator of light three-color light source Junior High School physical optics experiment teaching instrument

Capillary phenomenon demonstrator J2267 Middle School teaching instrument junior high school physics experiment equipment physical instrument

Electronic scale electronic balance 1000g miniature balance baking kitchen scale teaching equipment

Anhydrous sodium carbonate analytical pure ar500g soda ash PT benchmark sodium carbonate na_2co_3 chemical reagent industry

Physical experiment tool spiral micrometer spiral micrometer measuring surveying and mapping precision tool teaching instrument

Litmus solid powder acid-base indicator acid indicator 5G Middle School chemical reagent medicine teaching

Hand AC/DC generator 24019 junior and senior high school teaching experimental equipment physics Faraday electromagnetism

Oxygen preparation junior high school chemistry laboratory instrument test tube single hole rubber plug glass catheter latex tube Middle School

Magdebao hemisphere (cast iron) Magdeburg hemisphere iron Ball tester J2115 Science and Technology Experiment Teaching Instrument

Single pendulum group 5 balls 22023 single pendulum group physical mechanics teaching experimental equipment physical mechanics

Motor principle narrator 24020 motor principle structure model electromagnetic demonstration physics teaching instrument

Three-phase induction motor model J2422 Physical experiment equipment Physical electrical instrument

Magnetic suspension demonstrator J24061 junior high school physics electromagnetism experiment equipment teaching instrument

Junior high school student power supply 1.5~9V/1.5A voltage regulator/middle school physics experiment equipment teaching equipment

Friction electric stick glue stick fur glass stick silk physical friction electric electrostatic experiment large foil electroscope

Straight condenser tube glass condenser tube distillation experiment condenser tube glass instrument

Aircraft lift principle demonstrator wind tunnel model physics teaching instrument

Demonstration dynamometer 5N/2N spring dynamometer large dynamometer 04027 mechanics experimental equipment teaching instrument

Small Motor model/vertical/small motor tester physical experiment equipment

Optical bench convex lens imaging tester experimental rule experimental equipment device J25005 physical teaching instrument

Cylindrical volume surface area demonstrator derivation model cylinder expansion model conversion cuboid teaching aids

Experimental Supplies Basket Single Double Layer Experimental Reagent Basket Wooden Chemical Experimental Basket Reagent Bottle Basket Frame

Gasoline engine model 31008 four-stroke internal combustion engine model junior high school physics model teaching instrument

Organic Battery Box No. 1 battery box 2 No. 1 battery battery box physical experiment equipment teaching instrument

J2605 vertical diaphragm electrolytic cell electrolytic saturated salt water chemical instrument teaching instrument

Plant specimen clip full set of corrugated paper with absorbent paper Wood leaf clip plant specimen Biological Science Teaching

Fluid velocity and pressure relationship demonstrator teaching instrument high school physics experiment equipment

Rubber gloves protective gloves chemical experiment thickened thick beef tendon latex rubber dishwashing gloves household gloves

(Grade 8 Volume 1) physics experiment equipment suit full set of junior high school mechanics optics electromagnetism suit instruments