Assertion: tank's armor | /r/HasProperty | siliceous-cored
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Source sentences:
text: These tanks used many advanced or unusual features, such as siliceous-cored armor, the APFSDS-firing 90 mm T208 smoothbore gun in a rigid mounting without a recoil system, a new transmission, and the OPTAC fire-control system, which incorporated the T53 Optical Tracking, Acquisition and Ranging (OPTAR) system, emitted pulsed beams of intense but incoherent infrared light.