J2121 demonstration block and tackle, J2122 student block and tackleUse:1st, specially feed the physical teaching in the middle school and natural general knowledge discipline in the elementary school

J2121 demonstration block and tackle, J2122 student block and tackleUse:1st, specially feed the physical teaching in the middle school and natural general knowledge discipline in the elementary school

Product Name: Slide RheostatModel Number: J2354Place of Origin: ChinaJ2354-1 slide rheostat:Resistance: 0-20 ± 5%ΩTested current: 2A, bigJ2354-2 slide rheostat:Resistance: 0-20 ± 5%]

J2354-1 slide rheostat:Resistance: 0-20 ± 5%ΩTested current: 2A, bigJ2354-2 slide rheostat:Resistance: 0-20 ± 5%ΩTested current: 2A, smallJ2354-3 slide rheostat:Resistance: 0-50 &#

Our company can supply various types of lab instruments. These products are widely used in the primary and middle schools.

Our company can supply various types of lab instruments. These products are widely used in the primary and middle schools.

Solid geometry model is designed according to the standard of JY58-80. It is of whole body assembly type. The structure is clear (convenient for explanation), and each section uses different colors to

Solid geometry model is designed according to the standard of JY58-80. It is of whole body assembly type. The structure is clear (convenient for explanation), and each section uses different colors to

Tuning fork is used for acoustics basic instruments to demonstrate sound occurrence and sound interference. It may determine the sonic speed and the confirmation sound wave conduction and may be used