Read the pressure drop across the valve with a Watts Series PG meter.
利用美国瓦茨系列PG仪器读出通过阀门的压降。
Measure and record the differential pressure across the valve using a Watts Series PG meter. CAUTION: Safety glasses should be used.
采用美国瓦茨系列PG仪器测量和记录通过阀门的压差。警告:应该使用安全眼镜。
From Emsworth, PG Wodehouse on one occasion bicycled the 65 miles to London.
伍德豪斯骑自行车从埃姆斯·沃思出发,行程65英里到达伦敦。
This extra year is called a PG or postgraduate year.
这额外的一年被称为PG或毕业后学年。
We never add blood or gore and try and strike a balance to create something that is funny and somewhat inappropriate, but could still carry a PG rating.
Both U (universal) and PG (parental guidance) film ratings proscribe 「potentially dangerous behaviour which young children are likely to copy」. This includes drug misuse but not cigarette smoking.
There is, however, no public support for automatically classifying, for instance, a PG film at 18 just because it happens to contain a scene of smoking.