Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
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\begin{itemize}
\item{\bf Apply itemize to format a bullet list.}{\emph Add extra space between items if preferred.} Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
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\item{\bf Apply second itemize to format a sub-dashed list.} Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
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\item{\bf Apply itemize for format ``Bullet (last item)'' to format the ending item.} Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
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\subsection{SECOND-ORDER HEADING}
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
\subsubsection{Third-Order Heading}
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
\paragraph{Fourth-order heading}
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.
\paragraph{Fourth-order heading}
Flanges used in ultra-high vacuum service are commonly closed with metallic gaskets or seals. The geometry of the seal interface is critical for proper function. Experience has shown that flanges subjected to conventional welding techniques distort beyond a point that they can be sealed.