C. Vibration strike: it is used in drilling and casing with loosen sand, cobble stone and gravel layer etc.

振动击打：用于松散的砂、卵石、碎石地层的钻进及下套管等。

youdao

Suzugamori with sand, with the Vietnamese village girl, responding to simple and you strike up a conversation in English or Chinese can understand that many Vietnamese traditions, free shopping.

白浪触沙滩，时有淳朴的越南姑娘、小伙用简单的英文或中文与您搭讪，可了解到很多越南的风土人情，可自由购物。

youdao

Skipper Adam Barrett tried to clear a weak Wordsworth strike but his foot stuck in the sand close to the goal and the ball dribbled over the line.

BBC: Sport - Football - Colchester 2-0 Southend

By his own account, he is trying to strike a more positive profile this go-round, obviously seeking to sand away some of the rough edges left over from his time in the national spotlight in the 1990s.

WSJ: Newt Gingrich Threatens GOP's Chance to Nab Independents