1.} API 5L yog cov khoom siv thoob ntiaj teb, thiab muaj cov qauv siv hlau ua ntej, thiab x42 sib raug zoo rau L290, thiab muaj X42 / L290 ntawm PSL1 qib, thiab x42n / l42ns ntawm acidic cov ntaub ntawv tshaj tawm, x42NO / L290NO / L290NO ntawm cov ntaub acidic / kev pabcuam cov ntaub ntawv sau acidic /} lwm yam .
2.}} Siv tau rau roj, dej hauv cov roj ntsha tsis yog li ntawm cov roj thiab kev ua tau zoo} Yog tias qhov khoom lag luam zoo li no xws li xau .
3. Cov yeeb nkab ntau lawm, siv ntau yam kev kuaj ntshav, thiab kev kuaj ntshav kom puas, thiab lwm yam kev kuaj mob, thiab lwm yam .
4. Enterprises uas tsim cov yeeb nkab steel uas yuav tsum muaj cov cuab yeej siv hluav taws xob ua ntej nkag mus rau hauv kev lag luam.
5.} Muaj ntau ntau cov lus qhia tshwj xeeb ntawm Api 5L X42 Seamel kav hlau, uas feem ntau}}} (unit: mm)
