机修工努力维持直升机的飞行性能。The mechanics work hard to keep the he-licopters airworthy.机修工立即找到了出故障的地方。The mechanic located the fault immediately.这个机修工给我修汽车.The mechanic repaired my car....
造船中使用的金属板过去使用铆接, 现在则常用焊接.The metal plates used in making ships used to be riveted together, but now they are usually welded.他们把钢梁铆接在一起.They riveted the steel beams together.用于修补与加强焊缝、铆接 、 切割等作业造成的防护层损伤.Use to fix up and ...
氡和钍射气的子体易被气溶胶吸附.The daughter nuclides of radon and thoron tend to become attached.他们承认,含钍区内的Pb208会产生干扰.They recognized that in a thorium province Pb 208 would present complications.这基本上是用二氧化钍弥散强度化的镍基合金.This is essentiall...