Magnetic suction single pole single throw switch single knife teacher version physical electrical experiment demonstration equipment strong magnetic adsorption

Large magnetic suction type No. 1 battery box power box teacher version physical electromagnetism experiment equipment can be connected in series and parallel

Homemade simple electromagnet experimental production electromagnet primary school science DIY technology small production production electromagnet

Primary School Electrical Experiment Box Primary School Scientific Circuit Experiment Set Electromagnetics Test Equipment Interesting Science Teaching and Learning Tools

Spring No. 5 battery box scientific experiment power box primary and secondary school students physical electrical circuit experiment equipment teaching aids

69-type sensitive ammeter galvanometer junior high school physics electrical experiment equipment teaching aids laboratory instruments and meters

Large magnetic lamp holder teacher version physical and electrical experiment teaching demonstration equipment instrument adsorption blackboard

Large magnetic fixed resistance teacher version junior high school physics Electrical Experiment Teaching Demonstration equipment various resistance values

Large magnetic resistance law tester Teacher Edition junior high school physics Electrical Experiment Teaching Demonstration equipment

3v solar panel photovoltaic power generation experiment material physical experiment equipment instrument scientific experiment teaching aids

Photovoltaic power generation experimental material solar buzzer experimental device physical experiment equipment interesting scientific experiment

Resistance law tester copper wire nickel chromium wire junior high school physics electromagnetism experiment equipment scientific experiment material

Magnetic suction open motor Model Teacher version physical electromagnetism experiment teaching demonstration equipment

Large two-head crocodile clip wire copper core connecting line Physical Laboratory power cord test line factory direct supply

Single-head crocodile clip wire copper core U-shaped fork cable student physical Electrical Experiment power cord factory direct supply

Simple circuit experiment suit series small light bulb lights up Elementary School students' four-year electrical level scientific experiment materials

LED lamp holder junior high school physics electromagnetism experiment equipment teaching aids scientific experiment production materials

Measuring fixed resistance 5 ohm 10ohm unknown resistance junior high school physics electromagnetism experiment equipment scientific experiment

Hand generator experimental material suit middle school student physics experiment equipment primary school science experiment instrument teaching aids

Magnetic light-emitting diode LED lamp large Teacher version Junior High School physical Electrical Experiment Teaching Demonstration equipment

Large magnetic suction sliding rheostat Teacher Edition junior high school physics Electrical Experiment Teaching Demonstration equipment instrument

Magnetic suspension experiment suit circular magnet Junior High School physical magnetism experiment equipment children's scientific experiment materials

Electromagnetic induction experiment suit magnetic electricity generation experiment equipment junior high school physics electromagnetism experiment material square coil

Open motor model small motor junior high school physics electromagnetism experiment equipment scientific experiment material suit

Making simple small fan fun technology small production material package scientific experiment suit kindergarten early education toys

Interesting electromagnet experiment suit junior high school physics electromagnetism experiment equipment elementary school students' scientific experiment materials

Self-made four-wheel electric car primary school science experiment suit fun technology small production material package educational toys

Solar Adventure car primary school science experiment material package production electric toy car fun technology small production

Transmission power generation experiment suit interesting scientific experiment materials science small production kindergarten educational science and education toys

Plane mirror imaging experiment physical experiment equipment middle school student physical optical experiment equipment suit

Light three primary colors experiment suit grade two physical experiment equipment junior high school students physical optical experiment equipment

Convex lens imaging experiment suit grade two physical experiment equipment Middle School Student Physical optics experiment suit

Junior High School Physics optics experiment box optical bench convex lens imaging small hole imaging plane mirror imaging experiment suit

Wind power car sail car fun technology small production DIY Physics Experiment Elementary School student science experiment

Self-made simple compass experiment bar magnet making north pointer student DIY fun science small production

Simple lighting small bulb experimental equipment stainless steel screw small bulb holder small bulb bracket technology small production