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celebration production prediction permission
the; an /; the a; the a; an
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gate valve globe valve check valve plug cock
sending to send send sent
providing；for supplying；for offering；with providing；with
ought to should would must
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The globe valve may be suitable for partially open operation The globe valve will give full bore flow with change of direction The gate valve gives full bore flow with change of direction The gate valve is suitable for full bore operation only
committing having committed committed commits
The profile of the valve is like a globe The valve seat is set into the bulbous body The plug or disc of the valve is made vertical to the axis of the pipe The valve seat is located at right side of the plug or disc
worked are working have been working were working
the; the the; / /; / /; the
world earth geography globe
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