Well , if there is snow , you have to bring with you crampons , an ice axe , ice piton and snow goggles .

如果赶上下雪的话，你还得带上（装在登山靴上的）尖铁钉、破冰斧，冰锥和雪地眼镜。

an oblong metal ring with a spring clip ; used in mountaineering to attach a rope to a piton or to connect two ropes .

带有弹簧钩的金属环；在登山运动中应用的连在绳子上的岩钉或连接两条绳子。

Furthermore , because the manufacturing errors produce that the piston and the piton hole have certain ellipse so that the radial gap of piston friction pairs is unequal , the widening bit by bit flow gap can exist in the flow field so as to push the piston to move toward some direction and lead to the chucking phenomenon .

同时，由于制造误差的原因，柱塞和柱塞孔具有一定的椭圆度，即柱塞副的径向间隙不等，因此流场中可能存在渐扩流动形状，使得柱塞朝某一方向偏移，同样也会造成卡紧现象。

A new way of exchange between rotation and reciprocating motion through planetary driving was introduced , which was different from the one realized by piton pump moving with cam , brace and link .

采用行星齿轮传动方式实现从旋转到直线的往复运动，不同于现有柱塞泵由凸轮、曲柄连杆或斜盘实现往复运动的方式，没有滑靴等高压力作用下高速滑移的元件。