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1)  pressurization protectionm
正压保护
2)  Descriptors] positive pressure ventilation protection
通风正压保护
3)  orthogonally protect
正交保护
1.
Fmoc-Lys(Boc)-OH and Z-Lys(Boc)-OH were prepared from L-lysine by protection of α-amino and carboxy with 9-BBN, acylation with (Boc)2O and then orthogonally protection with overall yield of 80% and 78%, respectively.
以乙二胺为脱络合试剂,制得Nε-Boc保护的赖氨酸,然后再合成正交保护的Nα-芴甲氧羰酰基-Nε-叔丁氧羰酰基-L-赖氨酸及Nα-苄氧羰酰基-Nε-叔丁氧羰酰基-L-赖氨酸,总收率分别为80%和78%。
4)  front-side protection
正面保护
5)  positive phase protection
正序保护
1.
This paper introduce the principle and fixed match of Zhuhai Wanlida MMPR-20H-T1 microcomputer s positive phase protection .
本文介绍分析了珠海万力达MMPR-20H-T1微机正序保护动作的原理与整定,并通过空压机三次跳测车事故分析,即空压机正常运行时,MMPR-20H-T1微机三次正序保护动作分析,发现是保护装置中的正序保护延时定值有些问题,造成微机正序保护动作,空压机跳车。
6)  overpressure protection
超压保护
1.
The overpressure protection equipment designed for oilfield downhole fracturing truck, of which the internal circuit is composed of high accuracy data acquisition chip A/D ICL 7135 and its correlated interface technique, RS-422 serial communication , photoelectric isolation and phonic compound techniques etc, is based on high intelligent monitor of 8031 one chip computer.
为油田井下压裂施工仪表车而设计的超压保护装置是基于 80 3 1单片机的高智能型监控装置 ,内部电路采用高精度数据采集A/D芯片ICL713 5及其相关的接口技术、RS 42 2串行通信、光电隔离和语音合成等技术。
2.
The overpressure protection equipment is mainly designed for hydraulic fracturing in oil field.
超压保护装置主要是为油田井下压裂施工仪表车而设计的。
3.
Gas inlet/outlet,cell pressure test and overpressure protection were all managed on the console.
该压力控制台具有进/出气统一管理、反应釜试压以及系统超压保护等功能。
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性质:NPSHR  为NPSH的最小值,其数值决定于被送流体流经泵入口部位后产生的压力降。一般需通过试验确定。泵的NPSHR较小,表明泵的入口部分的阻力较小,吸入性能较好。NPSHR是泵性能的主要考核指标之一,一般考核泵在正常操作流量和额定流量下泵的NPSHR值。

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