关于packings的百科

• packings造句怎么写

• Thepackingsareingood(bad)order.TherearealittleleaksontherubberpackingsintheportsideseamsofNo.2hatch.I?veaskedthedrydocktorenewthedefectivepackings.DeterminationofbisphenolAinfoodpackingsbygaschromatography-massspectrometryRandompackingsincludeconjuga...
• 2018-10-1630286