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...
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....