20年的原文書如下,有人需要嗎(相贈)

1. FUNDAMENTALE OF STRUCTURAL ANALYSIS
HARRY H. WEST
2. CALCULUS WITH ANALYTIC GEOMETRY (五版)
EDWIN J.PURCELL DALE VARBERG
3.MECHANICS OF MATERIALS (THIRD EDITION)
GERE. TIMOSHENKO
4.ENGINEERING MECHANICS (六版)
RC. HIBBELER
5.VECTOR MECHANICS FOR ENGINEERS ( SECOND SI METRIC EDITION)
FERDINAND P. BEER E. RUSSELL JOHNSTON JR
HARRY H. WEST
2. CALCULUS WITH ANALYTIC GEOMETRY (五版)
EDWIN J.PURCELL DALE VARBERG
3.MECHANICS OF MATERIALS (THIRD EDITION)
GERE. TIMOSHENKO
4.ENGINEERING MECHANICS (六版)
RC. HIBBELER
5.VECTOR MECHANICS FOR ENGINEERS ( SECOND SI METRIC EDITION)
FERDINAND P. BEER E. RUSSELL JOHNSTON JR