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 .
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 .
