1) Activity 2) Disassembly 3) Dismantlement 1) Disassembly 2) Dismantlement 
• (p. pr. & vb. n.) of Dismantle
set of physical operations to disassembly partially or completely a nuclear installation
[n] - the act of taking something apart (as a piece of machinery)
dismantlement noun the act of taking something apart (as a piece of machinery); `Russia and the United States discussed the dismantling of their nuclear weapons`
Is the procedure used to fell a tree piece by piece when there is a lack of safe space to fell it whole.
Is the procedure used to fell a tree piece by piece when there is a lack of safe space to fell it whole.