In order to find out quick eggshell crack detection nondestructively for on-line application, frequency responses of an egg excited with a light mechanical impact at different locations on the eggshell were studied.
结果表明:敲击赤道不同的部位,完好鸡蛋各点的特征响应频率十分接近,而壳裂鸡蛋差别较大。
One that raps or strikes, especially a door knocker.
敲击者敲击或打击的人，尤指敲门者
A knocking or tapping sound.
敲击声敲击或叩击发出的声音
To strike(a bell) to produce music.
敲击敲击（一只钟）从而奏出音乐
The sound of a sharp tap on a hard surface;a rap.
敲击声在坚硬的表面上的急促敲击的声音；敲击声
Knock. Opens locked or psionically locked doors.
敲击术：敲开锁或以灵能锁住的门。
sound the wheels of a train,ie by striking them
敲击火车车轮进行检查.
She banged the keys of the piano.
她用力敲击钢琴键。
A pulsation produced by beating.
振动敲击产生的振动
The rain drummed upon the windowpane.
雨点敲击着窗玻璃。
He was hammering at the keys.
他在使劲敲击琴键。
The drum is a percussion instrument.
鼓是一种敲击乐器。
the sound made by a gentle blow.
轻轻敲击发出的声音。
The monitor rapped the meeting to order.
班长啪啪敲击宣布开会。
warm up a connection
敲击螺纹接头使之松动
The drummers beat out their tropical music.
鼓手敲击出热带音乐。
To make heavy, cutting strokes.
进行沉重、砍劈性的敲击
He clanged the fire bell.
他当当敲击火警钟。
Smith batted the table with his fist.
史密斯用拳头敲击桌子。