回接密封短节 tie-back sealing nipple
密封加长短节 seal extension
密封短节 pack off nipple
密封筒加长短节 seal bore extension
波纹管密封单座调节阀 HTSW ; Bellows seal single-seat control valve ; HCBW
进口波纹管密封调节阀 Bellows seal control valve
机械密封水调节管支架 Mechanical seal water regulation stent
内驱动联轴节密封 inner drive joint seal
机械密封水调节管 Mechanical seal of water regulation
如同在底板固定一节里所记述的那样，安装密封垫圈，平面垫圈及螺。
Install the sealing washer, flat washer and nut as described in the Floor.
它被介电感应高温密封，如果一个投掷节在里边被紧紧地拉伸，然后被释放，它足够有弹力能产生一个密封的封印。
It was sealed by dielectrically induced heat and was sufficiently elastic to yield a hermetic seal if a single throw knot in it were stretched tightly and then released.
牙轮钻头目前的发展趋势是实现高速化，随着钻头转速的不断提高，在恶劣环境下工作的普通轴承密封这一环节的薄弱性将显得越来越突出。
The recent development trend of cone bits is to realize their high speed. Faster the speed of bit is, the more weak of common bearing seals worked under the rough environment is.
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