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n4google.com.
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provhttp://www.w3.org/ns/prov#
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isa:310802644
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The holder block (18) is preferably constructed from a heat-resistant material, such as PTFE, stainless steel, ceramics, glass, or certain types of metals, glasses, or plastics, so that it will be able to withstand organic reaction conditions.
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n4:au
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