The mouthopener is intended for opening mouth in the first-aid.
开口器用于在紧急急救时打开患者牙关紧闭的上下颚。
2
The test mostly analyse the film mulching hill-drop planter from two aspects: One is mechanism of duck-mouth type punching-opener, One is analyse of metering device .
本文主要从两个方面对覆膜穴播机具进行分析：一是鸭嘴式成穴器的成穴机理；二是外槽轮式排种器的分析。
3
The utility model discloses a sealing and unsealing device for a bottle mouth, comprising an opener with eccentric feet, primary and secondary rotors, a spring, etc.