舵: rudder; helm头: 5点就得动身 have to start before ...材: timber上部舵杆,舵头材: rudder head (or upper stock); rudder upper stock (or rudder head)舵头: rudder head; rudderhead梢头材: head log; top log; top wood; topwood舵头舵承: rudder head bearing舵头帆布罩: rudder coat舵头水平销: norman触头材料: contact material; head material磁头材料: magnetic head materials刀头材料: tool tip material罐头材料: canning material烧结电触头材料: sintered electrical contact material上了清漆的木头材质: wood varnished电触头材料基本性能试验方法: test methods for essential porperty of electric contact material舵投影面积: projected area of rudder舵跳动: helm kick舵图: rudder plan舵填料函: rudder stuffing box舵托: rudder carrier; rudder horn; rudder riser; rudder-carrier舵特性: rudder performance
