UDC
p GB/T 50921 -2013
Code for design of fast-growing
and high-yielding timber plantation engineering
2013-09 -06 ~~ 2014 -05-01 ~Mt!
Code for design of fast-growing
and high-yielding timber plantation engineering
GB/T 50921 -2013
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GBT50921-2013 速生丰产用材林工程设计规范.pdf