gs \
  -o DelMarStaticResults_hl10.pdf \
  -sDEVICE=pdfwrite \
  -dPDFSETTINGS=/prepress \
 StaticInstrumentDepths_pm440_espww-49.4-hl10.pdf  \
 StaticInstrumentDepths_pm220_espww171-hl10.pdf \
 StaticInstrumentDepths_pm44_espww348-hl10.pdf StaticTensions_pm440_espww-49.4-hl10.pdf StaticTensions_pm220_espww171-hl10.pdf  StaticTensions_pm44_espww348-hl10.pdf