国内熟妇人妻色无码视频在线,人妻丰满熟妞AV无码区,国内熟妇人妻色在线视频

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    PEܳR

    2019-05-18 10:43:15 Դɽ|hĿƼɷ޹˾c

    peܳRЩhhСԔ

    1PE֬ܶȿɷ֞Ď

    PE֬ܶȿɷ֞

    ܶȾϩ    LDPE  0.90.93g/cm3ϩwľM

    ܶȾϩ    MDPE 0.930.94 g/cm3ϩc-ϩN۽M

    ܶȾϩ    HDPE  0.940.965 g/cm3ϩcϩϩϩw۽M

    hhoˮϩPE SֱN Ʒ|

    hhoˮϩPE SֱN Ʒ|

    2  PELoҺȿɷ֞Ď

    𣺿ɷ֞PE32PE40PE63PE80PE100ڽoˮʹPE80 PE100

    3  ȷּεÁ

    ISO9080Ҏ20rLoҺȌ_ϵСҪoҺMRS10ɵòϵĵȼMRSָ2050rgėlСҪoҺ

    4  PE63\ PE80\PE100^e?63,80,100քeָʲô?oˮһxķNҎ

    𣺲ϵȼMRS(5020)MPa

    PE100  10 MPa

    PE80   8 MPa

    PE63   6.3 MPa

    hh ؾϩPEȼܲ

    ؾϩPEȼܲ

    ^MRSָBmʩԓϩ֬ƹܹܱ50rܲƉĕrӋڹܱϵĭh򏈑^A

    PE63 ϵйܲһڳ悼loˮQָܲ20ݔˮS

    PE80 ϵйܲҪڳнoˮQָܲ20ݔˮS

    PE100 ϵйܲ؄emôڏ߉oˮQָܲ20ݔˮS

    PE80 PE100ȼҲhttp://www.mm-mcafee.com/

    PEܳR

    国内熟妇人妻色无码视频在线,人妻丰满熟妞AV无码区,国内熟妇人妻色在线视频