场地上还有一个陡坡，类似斜切面，不利于住宅的建造。
The land presented a steep slope, a sort of diagonal plane, not conducive to residential appropriation.
闸板底部做成刀形斜面具有切断介质功能，而且闸板关闭时通过阀体上的锲块紧靠闸板斜切面使得闸板紧紧贴靠阀座密封面，从而起到了密封效果。
The bottom of the disc is made of knife-shaped gate with a cut off function of the medium. When gate is closed, oblique plane of gate valve encounters wedge block of gate to achieve sealing effect.
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