- 重点词汇
- 滑膛
bore of a gun or cannon without rifling
- 气枪
airgun; air rifle; pneumatic gun
- 打猎
go hunting
- 客服
customer service
- 微信
WeChat
- 安全
security; safe; secure; unthreatened
- 保密
maintain confidentiality/secrecy; keep secret
- 原理图
schematic circuit
- 说明书
(book of) directions/instructions; (technical) manual; specification sheet