. . "piston"@en-us . . . . "103948950"^^ . . . . . . . . "103131951"@en-us . "mechanical device that has a plunging or thrusting motion"@en-us . "03948950-n"^^ . . . . . . . . . . . . . . . . "mechanical device that has a plunging or thrusting motion"@en-us . . . "103799441"@en-us . "0"^^ . . . . "plunger"@en-us . . . . . "piston"^^ . . . . . . "0"^^ . .