口两侧各有一对钩，虫体布满似乳突状小棘，只有成虫前端和末端两侧可见散在的隆起的椭圆孔状感觉器，虫体末端腹面可见肛孔。
There was a pair of curved hamuli on both sides of the mouth, while small spines like mastoid process were covered with the shape of the body.
CR300 H美国吧哈- . 459“内腔，第一滑动拇指钩，蒙乃尔合金活塞，透明亮漆，吧哈349 - 6吹口，5091盒子。”
CR300H Bach USA -. 459 "bore, 1st slide thumb hook, Monel pistons, clear lacquer, Bach 349-6 mouthpiece, 5091 case".
弯口钩环能够很快速又容易的把绳子扣入，常用在快扣的挂绳端。
Bent-gate carabiners are designed for fast, easy clip-ins. They're used on the rope end of quick draws.
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