打雷艇
sweptwing aircraft───转弯飞机
leading aircraftman───机长
leading aircraftmen───机长
beaking joint───尖口接头
beaming smile───笑容可掬
bearing cap───[机]轴承盖,轴承压盖
bearing caps───轴承盖
bearing pedestal───轴承座
bearing pedestals───轴承座