扣齿链 meaning in Chinese

sprocket chain

Locking pin on the gantry and bolts of a sprocket chain , which are the approved safety devices to avoid uncontrolled movement of
事发时，原定用以防止钢阵移位的两项安全装置（定位锁及扣齿链螺栓）未有装上。
Among the designs left by leonardo da vinci almost 500 years ago ? with notes written backward to be read with a mirror ? were the parachute ， life jacket ， water pump ， swim fins ， well digger ， paddle - wheel boat ， horseless carriage ， sprocketchain ， steam gun ， water turbine ， lens - grinding0 machine ， shrapnel ， machine gun ， airplane ， helicopter ， submarine ， and mass production
近500年前列奥纳多?达?芬奇留下的许多设计稿? ?即须通过镜子才能读懂的反着写的笔记，其中有降落伞、救生衣、水泵、游泳脚蹼、钻井机、明轮机、无马马车、扣齿链、蒸汽枪、水轮机、磨镜片机、子母弹、机关枪、飞机、直升飞机、潜水艇和成批生产的设计。