packings的精选

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用“packings”造句大全，packings造句

用“packings”造句大全，packings造句

2018-10-16
Thepackingsareingood(bad)order.TherearealittleleaksontherubberpackingsintheportsideseamsofNo.2hatch.I?veaskedthedrydocktorenewthedefectivepackings.DeterminationofbisphenolAinfoodpackingsbygaschromatog...