The "increasing payment base" also could relieve the puzzle of pension payment without negative externality but there was such defect as slow implement time or new public financial pressure.
“增加缴费人数”亦可以缓解养老金支付困境，且不存在负外部性，但推行时间缓慢，或将产生新的公共财政压力。
Safe: negative pressure combustion, not against fire, without the danger of explosion, and water, electricity, auto alarm, using PC control.
安全性高：负压燃烧、不逆火、无爆炸之虞，且断水、断电、自动报警，采用PC控制。
And the automatic winding machine cannot work without the stable negative-pressure system.
而自动络筒机的顺利工作离不开一个稳定的负压系统。
The utility model discloses a negative pressure generator used by a water pump suction pipe without a bottom valve.
本实用新型公开了一种无底阀水泵吸水管用负压发生器。
The utility model discloses a negative pressure generator used by a water pump suction pipe without a bottom valve.
本实用新型公开了一种无底阀水泵吸水管用负压发生器。
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