A.承受扭應(yīng)力和彎曲應(yīng)力B.承受剪切應(yīng)力和附加應(yīng)力C.承受壓應(yīng)力但不承受拉應(yīng)力
A.低速B.中速C.可倒轉(zhuǎn)
A.雙機(jī)單槳B.多機(jī)單槳C.調(diào)距槳