OR Logic Gate, 2-Input Pack Size_7 Nylon ball-bearing pulley with a

Nylon ball-bearing pulley with a bench-clamp fitting for edge-mounting on a worktable

5 inches thick

Pack of 10 Stoddard test tube clamps in stainless steel with finger grip securely holds test tubes during heating

and 12 volts on this 2-amp battery eliminator power supply

this three-dimensional Paramecium sectional model reveals internal structure and ciliate organization for microbiology teaching

OR Logic Gate, 2-Input Pack Size_7 Nylon ball-bearing pulley with aLED indicating 2 input OR gate module showing HI and LO states with red and green LEDs and a printed truth table on the board, verifying the Boolean disjunction operation by direct observation.