A.同時(shí)除銹的幾個(gè)為互相照應(yīng),應(yīng)盡可能靠近一些 B.敲繡錘應(yīng)越鋒利越好 C.必須戴防護(hù)眼鏡和防護(hù)手套
A.隨動(dòng)舵 B.自動(dòng)舵 C.應(yīng)急舵
A.275° B.235° C.282°