燃气计量表的安装位置应满足（）、（）和安全使用的要求。
OAP IF ANY TO BE CHTRS ACCT BUT OWNERS CONTRIBUTION USD 0.3/MT. What does OAP stand for?（） ["Old Age Pension","Overage Additional Premium","Organization of Arab Petroleum countries","Optimum amplitude and phase modulatio"]
如何选择安全通道和疏散设施？
Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）. ["open the steam line mot valve","drain the steam cylinder","close the steam cylinder drains","open the liquid cylinder drai"]
微笑的主要特征是什么？
逃生时如何经过烟雾区？
