1. We specialize in making a wide range of ball valves, brass ball, brass ball valve, ball valves accessories, ball valves manufacturers. 基元铁工厂制造铜球铜球阀,球阀,铜球,铜球阀,球阀,不
2. By now, there are four methods of earth: neutral point un-earth, neutral point directly earth, neutral point earth with resistance, neutral earth with an arc suppression coil. 目前主要的接地方式有中性点不接地、中性点直接接地、中性点经电阻接地、中性点经消弧线圈接地。
3. By now, there are four methods of earth: neutral point un-earth, neutral point directly earth, neutral point earth with resistance, neutral earth with an arc suppression coil. 目前主要的接地方式有中性点不接地、中性点直接接地、中性点经电阻接地、中性点经消弧线圈接地。
4. Does the player incur a penalty under Rule 15-3 for playing a wrong ball, even though that wrong ball was played in mistake for a provisional ball which never became the ball in play? 这名球员会按照规则15-3,因打了一个错球而被罚一杆吗,即使那个错球是错误的做为临时球被打,而且一直没有成为使用中球?