刹车

Bullish Consensus, Commitments of Traders, New High - New Low Index, and others reflect the general levels of bullishness or bearishness in the market.

有情绪指标，持仓量报告，新高新低指数等等，它们反映市场涨跌心理的整体水平。

To sum up:balance valve and constant flow control valve are optional equipment,and set the flow valve generally not be considered.

综下所述：平衡阀和恒流量调节阀都是可选的配备，而定流量阀一般出无予考虑。