TY - RPRT TI - Wear mechanisms of valves and valve seat inserts in a gas-fired reciprocating engine AU - Lacey, P I AU - Hsu, S M AU - Gates, R S AU - Lee, S AU - Ives, L AU - Ku, C AU - Pei, P AU - Wang, Y AU - Whitenton, E P AU - Munro, R G PY - 1990 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 90-4264 DO - 10.6028/NIST.IR.90-4264 ER -