最后的性与爱,韩国三级HD激情,高清性色生活片

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  • P52 machine sealing system
    Design pressure≤5.0 MPa.G
    Design temperature≤250℃
    Volume:12L/20L
    Standard:API682
    Auxiliary plan for poison combustible,explosive,and pollutional medium of centrifugal pump prevent medium from draining away directly into environment,recycled fluid take the heat away from operation of mechanical seal,provide lubrication for mechanical seal as well as extend its service life
     
    P52 machine sealing system
    Design pressure≤5.0 MPa.G
    Design temperature≤250℃
    Volume:12L/20L
    Standard:API682
    Auxiliary plan for poison combustible,explosive,and pollutional medium of centrifugal pump prevent medium from draining away directly into environment,recycled fluid take the heat away from operation of mechanical seal,provide lubrication for mechanical seal as well as extend its service life
    最后的性与爱,韩国三级HD激情,高清性色生活片