{HEAD ~ The packing assembly} was subjected to {TAIL ~ an EPA Method 21 leakage test} with over 100,000 mechanical cycles of operation, and a packing leakage of less than 500 ppm was obtained using methane as the test fluid 
subjected to
{ HEAD ~ The packing assembly } was subjected to { TAIL ~ an EPA Method 21 leakage test } with over 100,000 mechanical cycles of operation , and a packing leakage of less than 500 ppm was obtained using methane as the test fluid
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH