lampholder power
laboratory scew jack
lemon / fruit battery
light store mateial
light box with F letter
light bulbs
light progress demonstration case
light crystal material
light elastic demon. kit
light intensity meter
light ray incident path kit
linear expansion heat apparatus
living organisms expt apparatus
laboratory stool wood / iron
laboratory spectacle cabinet
laboratory movable bench
longitudinal wave model
logic gate junior kit
lens water fill
lens/ mirror
living organsim life study box
liquid crystal film
liquid timer
liquid volume set
light earpick "optical fiber"
lung breathing model Japan
lung models
new way
lung model glass
lung capacity water column