滑輪組特點

    滑輪組特點

    dinghualunkeyigaibianlidefangxiang
，danbunengshenglidiladongwuti。donghualunbukeyigaibianlidefangxiang，dannengshengyibandelidiladongwuti。hualunzujieheledinghualunhedonghualun
，zheyangjikeyigaibianlidefangxiang，younenghenshenglidiladongwuti。ruobujihualunzushiyongzhongsuozuodeewaigong，donghualunyongdeyueduoyueshengli。