帮我看一下这段话有没有语法错误,
MyEnglishissopoor.soImisunderstandingtheinformation.Iamsosorry.
Ihaveaddedtwokindsofcoilstoinvoiceandthesecoilsareready.
Becausewecouldnotfindtheinformationoffemalcoilsconnerctorwith4coaxcables30cmlongwithSMA,Iamafraidtomistake,plsgivemeaphoto.
Wehave4-ChannelSecondarySignalAmplifier-modifiedfor12VPowerSupply.ButIdonotknowyouwanthowmuch.PleasetellmeASAP.