Hauj lwm lawm
Xa kev nug
Daim ntawv thov
45 Degree luj tshib yog dav siv nyob rau hauv pipelines, 45 degree sanitary luj tshib Nyob rau hauv lub pipeline system, lub luj tshib yog ib tug yeeb nkab haum uas hloov cov kev taw qhia ntawm lub pipeline.
