| 摘要 |
A portable, self-contained, light-weight, compact and explosion-proof device, that is readily dismantable and transportable by automobile or aircraft, for inspecting the ignition surfaces of a solid propellant rocket motor can be introduced into the motor from the aft end thereof with or without the nozzle in place and is characterized in that a light source, reflecting means and viewing means are so arranged therein as to allow an operator to observe from outside the motor the condition of the entire ignition surface from either the aft end or the head end of the motor.
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