নিমজ্জিত ডিজিটাল Geophone স্ট্রিং মগ্নচড়া এবং উপকূলবর্তী জলের জিডব্লিউ সিরিজ জন্য উপযুক্ত

GL Series Terrestrial Digital Geophone strings GW Series Submersible Digital Geophone String​ Fast detailed description: have good water resistance and can be used in all kinds of water environment easily. Description: GW Series Submersible Digital Geophone String are a new series of submersible digital geophone strings,those geophone strings have good water resistance and can be used in all kinds of water environment easily. Especially,the strings are suitable for shoal and