This is also in line with the recommendation of the report on enhancement of highway safety released in december 2003 . 它亦合乎二三年十二月发表《改善公路安全研究报告》内的建议。
2.
They are seated on the spring plate ( 3 ) and act through the clips ( 4 ) to provide a safety release mechanism in the event of the orifice becoming clogged 弹簧盘( 3 )通过夹子( 4 )来提供安全限压功能，在喷口被堵塞时进行压力释放。
3.
Home economics - safety release devices with built - in stopcock and two g 1 2 male union connections for domestic appliances using mains supplied gaseous fuels 家庭经济.家用管道燃气设备用带嵌入式旋塞和双g1 2外螺纹连接的安全释放装置
